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pVC, a Small Cryptic Plasmid from the Environmental Isolate of Vibrio cholerae MP-1

  • Zhang, Ruifu;Wang, Yanling;Leung, Pak Chow;Gu, Ji-Dong
    • Journal of Microbiology
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    • v.45 no.3
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    • pp.193-198
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    • 2007
  • A marine bacterium was isolated from Mai Po Nature Reserve of Hong Kong and identified as Vibrio cholerae MP-1. It contains a small plasmid designated as pVC of 3.8 kb. Four open reading frames (ORFs) are identified on the plasmid, but none of them shows homology to any known protein. Database search indicated that a 440 bp fragment is 96% identical to a fragment found in a small plasmid of another V. cholerae. Further experiments demonstrated that a 2.3 kb EcoRI fragment containing the complete ORF1, partial ORF4 and their intergenic region could self-replicate. Additional analyses revealed that sequence upstream of ORF1 showed the features characteristic of theta type replicons. Protein encoded by ORF1 has two characteristic motifs existed in most replication initiator proteins (Rep): the leucine zipper (LZ) motif located at the N-terminal region and the alpha helix-turn-alpha helix motif (HTH) located at the C-terminal end. The results suggest that pVC replicates via the theta type mechanism and is likely a novel type of theta replicon.

Evaluation of Protective Performance of Protection Materials for Field and Structural Body by Ignition of 155mm Artillery Shell and C-4 Explosive (155mm 포탄 및 C-4 90kg 기폭에 의한 야전구축 방호자재 및 구조체용 신방호자재의 방호성능 평가)

  • Lee, In-Cheol;Kim, Hong-Seop;Nam, Jeong-Soo;Kim, Suk-Bong;Hong, Won-Hee;Kim, Gyu-Yong
    • Journal of the Korea Institute of Military Science and Technology
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    • v.16 no.4
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    • pp.493-500
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    • 2013
  • In this study, it was evaluated the protective performance of the protection material for filed of the army by impact of fragment from the explosion of 155mm artillery shell to propose the improvement items. And it was evaluated the protection materials for structural boby such as corrugated steel plate, concrete block, prevention paint of explosion, aluminum foam and concrete T-wall by impact of fragment of 155mm artillery shells and explosion-induced pressure of C-4 explosive. As a result, protective performance of the existing protective material was superior but reinforcement is necessary for secondary damage because sand is leaking. The protective performance of new protective materials was greater than existing protective materials. And it can be used for protective materials.

Cleaved Amplified Polymorphic Sequence and Amplified Fragment Length Polymorphism Markers Linked to the Fertility Restorer Gene in Chili Pepper (Capsicum annuum L.)

  • Kim, Dong Sun;Kim, Dong Hwan;Yoo, Jae Hyoung;Kim, Byung-Dong
    • Molecules and Cells
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    • v.21 no.1
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    • pp.135-140
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    • 2006
  • Cytoplasmic male sterility (CMS) in plants, which is due to failure to produce functional pollen, is a maternally inherited trait. Specific nuclear genes that suppress CMS, termed fertility restorer (Rf) genes, have been identified in several plants. In this study, Rfl-inked molecular markers in pepper (Capsicum annuum L.) were detected by bulked segregant analysis of eight amplified fragment length polymorphisms (AFLPs). Only AFRF8 was successfully converted to a cleaved amplified polymorphic sequence (CAPS) marker. This was named AFRF8CAPS and genotype determination using it agreed with that obtained with the original AFRF8. A linkage map with a total size of 54.1 cM was constructed with AFRF8CAPS and the seven AFLP markers using the Kosambi function. The AFRF8CAPS marker was shown to be closest to Rf with a genetic distance of 1.8 cM. These markers will be useful for fast and reliable detection of restorer lines during $F_1$ hybrid seed production and breeding programs in pepper.

The Comparison of Sequencing Method with Restriction Fragment Mass Polymorphism Method for the Detection of HBV YMDD Mutants (HBV YMDD 돌연변이형 검사 시 염기서열법과 Restriction Fragment Mass Polymorphism 법의 비교)

  • Jung, An-Na;Jung, Hee-Kyoung;Choi, Sam-Kyu;Park, Chung-Oh
    • Korean Journal of Clinical Laboratory Science
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    • v.37 no.3
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    • pp.173-177
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    • 2005
  • YMDD motif mutants of the hepatitis B virus(HBV) emerge in chronic hepatitis B patients after prolonged lamivudine treatment. HBV DNA breakthrough may be accompained by the emergence of YMDD mutants. We compared the performance of the sequencing method with that of RFMP method in chronic hepatitis B patients who had suffered the HBV DNA breakthrough after lamivudine treatment. Both sequencing and RFMP methods were used to detect YMDD variants in 20 chronic hepatitis B patients. YMDD mutants were detected in 17 samples (85.0%) by both methods. Among them, no mutants were detected in two samples(10.0%), while they were detected in the other sample(5.0%) with the RFMP method. The concordance rate between both methods was 95.0%. There was inconsistency in one sample showing mutants detected by the RFMP method, but not by sequencing method. In the sequencing method, the mutants was detected in the major type virus, but not in the minor type virus. However, both sequencing and RFMP methods were highly concordant except in one sample, so it is suggested that both methods are useful to detect YMDD mutants of chronic hepatitis B patients.

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p62, a Phosphotyrosine Independent Ligand of SH2 Domain of $p56^{Ick}$, is Cleaved by Caspase-3 during Apoptosis in Jurkat Cells

  • Joung, Insil
    • Animal cells and systems
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    • v.5 no.2
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    • pp.145-151
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    • 2001
  • p62 is a phosphotyrosine-independent ligand of the SH2 domain of $p56^{Ick}$, a T-cell specific Src family tyrosine kinase. Recently p62 has been shown to interact with a number of proteins, such as $PKC\varsigma$ and ubiquitin, and implicated in important cellular functions such as cell proliferation. Since the two p62 interacting proteins, $p56^{Ick}$ and $PKC\varsigma$, have been reported to play roles in cell death, 1 have addressed the potential role of p62 during apoptosis in Jurkat cells in this study. Herein 1 show that p62 was specifically cleaved into two peptides by a caspase-3-like activity during Fas-receptor mediated apoptosis in Jurkat cells. This cleavage generated two fragments with molecular weights of about 35 kDa that differed in subcellular localizations. The N-terminal cleaved fragment was present in the detergent-insoluble fraction whereas the C-terminal fragment was found in the detergent-soluble fraction. In addition, the C-terminal fragment appeared to be subjected to further degradation as apoptosis prolonged. Moreover, overexpression of p62 in Jurkat cells attenuated the Fas receptor mediated apoptosis, suggesting that p62 is involved in apoptotic signal transduction pathway in lymphocytes.

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An Efficient Markerless Deletion System Suitable for the Industrial Strains of Streptomyces

  • Dong, Jianxin;Wei, Jiaxiu;Li, Han;Zhao, Shiyao;Guan, Wenjun
    • Journal of Microbiology and Biotechnology
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    • v.31 no.12
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    • pp.1722-1731
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    • 2021
  • The genus Streptomyces is intensively studied due to its excellent ability to produce secondary metabolites with diverse bioactivities. In particular, adequate precursors of secondary metabolites as well as sophisticated post modification systems make some high-yield industrial strains of Streptomyces the promising chassis for the heterologous production of natural products. However, lack of efficient genetic tools for the manipulation of industrial strains, especially the episomal vector independent tools suitable for large DNA fragment deletion, makes it difficult to remold the metabolic pathways and streamline the genomes in these strains. In this respect, we developed an efficient deletion system independent of the episomal vector for large DNA fragment deletion. Based on this system, four large segments of DNA, ranging in length from 10 kb to 200 kb, were knocked out successfully from three industrial Streptomyces strains without any marker left. Notably, compared to the classical deletion system used in Streptomyces, this deletion system takes about 25% less time in our cases. This work provides a very effective tool for further genetic engineering of the industrial Streptomyces.

Video-based Stained Glass

  • Kang, Dongwann;Lee, Taemin;Shin, Yong-Hyeon;Seo, Sanghyun
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.16 no.7
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    • pp.2345-2358
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    • 2022
  • This paper presents a method to generate stained-glass animation from video inputs. The method initially segments an input video volume into several regions considered as fragments of glass by mean-shift segmentation. However, the segmentation predominantly results in over-segmentation, causing several tiny segments in a highly textured area. In practice, assembling significantly tiny or large glass fragments is avoided to ensure architectural stability in stained glass manufacturing. Therefore, we use low-frequency components in the segmentation to prevent over-segmentation and subdivide segmented regions that are oversized. The subdividing must be coherent between adjacent frames to prevent temporal artefacts, such as flickering and the shower door effect. To temporally subdivide regions coherently, we obtain a panoramic image from the segmented regions in input frames, subdivide it using a weighted Voronoi diagram, and thereafter project the subdivided regions onto the input frames. To render stained glass fragment for each coherent region, we determine the optimal match glass fragment for the region from a dataset consisting of real stained-glass fragment images and transfer its color and texture to the region. Finally, applying lead came at the boundary of the regions in each frame yields temporally coherent stained-glass animation.

Unrecognized bony Bankart lesion accompanying a dislocated four-part proximal humerus fracture before surgery: a case report

  • Lee, Seungjin;Shin, Daehun;Hyun, Yoonsuk
    • Clinics in Shoulder and Elbow
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    • v.25 no.1
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    • pp.68-72
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    • 2022
  • Proximal humerus fractures are the third most common fractures, totaling 4% to 5% of all fractures. Here, we present the case of a 39-year-old man with a dislocated four-part fracture of the proximal humerus with a huge bony Bankart lesion. Preoperatively, the bony Bankart lesion of the glenoid was not visualized on computed tomography scans or magnetic resonance imaging because the fracture of the proximal humerus was comminuted, displaced, and complex. It was planned for only the humerus fracture to be treated by open reduction and internal fixation using a locking plate. However, a fractured fragment remained under the scapula after reduction of the dislocated humeral head. This was mistaken for a dislocated bone fragment of the greater tuberosity and repositioning was attempted. After failure, visual confirmation showed that the bone fragment was a piece of the glenoid. After reduction and fixation of this glenoid part with suture anchors, we acquired a well-reduced fluoroscopic image. Given this case of complex proximal humerus fracture, a glenoid fracture such as a bony Bankart lesion should be considered preoperatively and intraoperatively in such cases.

Reconstruction of Triceps Tendon Avulsion Using Mesh Graft and Krackow Suture in a Border Collie

  • Hyeon-Jong Choi;Jong-Hoon Kim;Eunchae Yoon;Tae-Sung Hwang;Hee-Chun Lee;Dongbin Lee;Jae-Hoon Lee
    • Journal of Veterinary Clinics
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    • v.39 no.6
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    • pp.378-383
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    • 2022
  • A 3-year-old, 24-kg intact female Border Collie was referred for a toe-touch weight-bearing stance, intermittent weight-bearing lameness, and moderate pain reaction of the right forelimb on physical examination and right humerus olecranon avulsion fracture on diagnostic imaging examination. Surgical repair was performed using tension band wiring to re-attach the triceps tendon and distal olecranon. Migration of the distal olecranon fragment was observed due to comminuted fracture of the fragment 5-days after surgery, and revision surgery was performed. The tension-relieving sutures were passed through the pre-drilled hole in the olecranon, and the polyester mesh was augmented to the suture region, covering the triceps tendon and olecranon drilling hole using the Krackow suture pattern. The elbow joint was immobilized using a type IA transarticular external fixator, which was removed 8 weeks after surgery. Fourteen weeks after surgery, no lameness was observed on gait evaluation. At follow-up after 7 months, the distal olecranon fragment had stabilized, and no lameness was observed.

Identification of potential molecular markers for disease resistance in giant gourami through major histocompatibility complex (MHC) II gene analysis

  • Ikhsan Khasani;Rita Febrianti;Sularto;Wahyu Pamungkas;Keukeu Kaniawati Rosada
    • Fisheries and Aquatic Sciences
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    • v.27 no.3
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    • pp.159-170
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    • 2024
  • Research to obtain molecular markers related to the major histocompatibility complex (MHC) gene in both strains of gourami is essential to increase the success of the selection program of disease resistance traits. Using a completely randomized design (CRD), the challenge test consists of four treatments and seven replications. The treatment was Jambi gourami injected with PBS (KJ), Kalimantan gourami injected with PBS (KK), Jambi strain injected with Aeromonas hydrophila (GJ), and Kalimantan strain injected with A. hydrophila (GK). The GJ population was more resistant to A. hydrophila than the GK population. The MHC II gene was detected in both test strains (GJ and GK), both resistant and susceptible fish. However, there were differences in the results of amplifying the MHC II gene in susceptible and resistant fish. Two DNA fragments approximately 400 and 585 bp were detected in the genome of susceptible fish, while in the genome of susceptible fish, only one DNA fragment was detected (400 bp). Therefore, the MHC II gene fragment with a size of about 585 bp can be used as a potential candidate for specific molecular markers to obtain resistance to A. hydrophila bacteria in the giant gourami.