• 한국진공학회:학술대회논문집
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• 한국진공학회 2013년도 제44회 동계 정기학술대회 초록집
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• pp.110-111
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• 2013

FcBP consisting of 13 amino acids specifically binds to Immunoglobulin G Fc domain. Initially, we utilized this peptide for preparation of antibody chip as a PEG composite for enhanced solubility. After then, the peptide conjugate was immobilized on agarose resin, resulting in highly efficient affinity column for antibody purification. The efficiency was comparable to commercial Protein A column. Recently, this peptide was conjugated with cell penetrating peptide (CPP) on a backbone of GFP, affording antibody transducer, which carries antibody into live cells by simple mixing of antibody and the transducer in cell culture media. Antibody transduction into cells was monitored by live cell imaging. More recently, the FcBP was fused to ferritin cage, which consists of 24 ferritin protein molecules. The FcBP-ferritin cage showed greatly increased binding affinity to human IgG. Its binding was analyzed by QCM and SPR analysis. Finally, it was selectively delivered by Herceptin to SKBR3, a breast cancer cell, over MCF10A, non-tumorigenic cells (Fig. 1). Fig. 1. Fluorescent microscopic images of SKBR3 breast cancer cells (A~C) and MCF10A breast cells (D~F) treated with Cy3-trastuzumab/fFcBP-Pf_Fn complexes. Trastuzumab and FcBP-Pf_Fn, which were labeled with Cy3 (Cy3-trastuzumab) and fluorescein (fFcBP-Pf_Fn), respectively, selectively targeted SKBR3 over MCF10A.

• 한국식품저장유통학회지
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• 제23권4호
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• pp.553-559
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• 2016

고흥산과 캘리포나이산의 석류나무(Punica granatum L.) 과실을 과육, 종자 및 외과피로 분리하여 부위별 총 페놀성 함량, 안토시아닌 함량, DPPH 라디컬 소거능에 대한 항산화 활성 및 항암활성을 비교 검토하였다. 석류과실의 총 페놀성 함량은 외과피>주스>종자 순으로 유의적인 차이로 높게 나타났다. DPPH 라디컬 소거능은 외과피>주스>종자 순으로 높았고, 특히 외과피의 항산화 활성은 vitamin C와 유사한 활성을 보였다. 폐암세포주(Calu-6)에 대한 추출물의 항암활성은 외과피>종자>과육 순으로 높게 나타났다. 고흥산 석류 과실 부위별 총 안토시아닌 함량은 외과피>주스>종자 순으로 나타났고, 함유된 주요 안토시아닌은 Cy3,5G로서 가장 높은 함량을 보였고 그 다음이 Cy3G,Dp3,5G순으로 높게 나타났다. 총 페놀성 함량과 Calu-6 폐암세포주 활성 간이 $r^2=0.9706$으로 가장 높았고, 그 다음이 총 페놀성 함량과 DPPH 라디컬 소거능 간, DPPH 라디컬 소거능과 Calu-6 폐암세포주 활성 간 순으로 상관계수($r^2$)가 각각 0.8904, 0.8309로 나타나 상호 연관이 있음을 나타냈다.

• Journal of Gastric Cancer
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• 제19권3호
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• pp.329-343
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• 2019

Purpose: Gastric cancer with lymph node metastasis (LNM) more than 15 (N3b) was defined as stage IV until the 6th AJCC system. However, it has been reclassified as a localized disease (stage IIb or III) since the 7th system. The aim of this study is to demonstrate that the survival of N3b is comparable to cytology-only positive (CY1-only) stage IV and to propose a new TNM system interpreting N3b as an eligibility criterion for receiving more intensive chemotherapy regimens. Materials and Methods: 1,430 patients who underwent gastric cancer surgery at Seoul National University Hospital from 2007 to 2012 were retrospectively analyzed. The 5-year survival rate (5YSR) and 3-year recurrence-free survival (RFS) were evaluated according to the 7th and 8th systems, as well as a new categorization based on N-classification; N0-2 (LNM<7), N3a (LNM 7-15), or N3b (LNM>15). Results: The survival of N3b is comparable to that of CY1-only stage IV (log rank test, P=0.671) and is distinct from that of grossly stage IV (log rank test, P<0.001). The survival of the remaining stage IIIc (T4bN3a) was comparable to those of N3b and CY1-only stage IV. Most N3b patients had significantly shorter 3-year RFS and mean RFS than those with IIb-IIIc, as if N3b itself was a higher TNM stage. Conclusions: In terms of survival, T4bN3a, N3b, and CY1-only stage IV were unified as stage IVa, while grossly stage IV was defined as stage IVb. N3b can be regarded as an eligibility criterion for undergoing more intensive chemotherapy regimens.

• 한국해양공학회지
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• 제34권3호
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• pp.194-201
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• 2020

In this study, an optical-fiber sensor was used to measure loads that could act in an environment similar to the loading conditions that exist in an actual pipe. The structure and the installation method of the optical-fiber strain sensor were applied considering the actual large pipe and the buried pipe environment. Load tests were performed using a displacement sensor and sandbags to determine the deflection of the pipe according to the external load, and the linear measurement results were verified. Considering the conditions that could exist in the actual pipe, the test method was presented, and the strain of the buried pipe generated at this time was measured.

• 한국식품영양과학회지
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• 제30권3호
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• pp.410-414
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• 2001

A new bacteriocin produced by Bacillus licheniformis cy2 was partially purified and characterized. The bacteriocin named as BSCY2 was stable in the pH range of 2.5~9.5. BSCY2 was stable below 4$0^{\circ}C$ and it retained its antimicrobial activity during long tern storage at -2$0^{\circ}C$ and -7$0^{\circ}C$. BSCY2 was inactivated 15 min exposure to temperatures over 8$0^{\circ}C$ and lost 50% of its antimicrobial activity within 2 hr at 7$0^{\circ}C$. BSCY2 was inactivated by proteinase K treatment, which indicates its proteinous nature. Direct detection of the BSCY2 band showing antimicobial activity on Tricine-SDS-PAGE suggested an apparent molecular mass of about 6,500 dalton. These characterizatics of BSCY2 are considered as potential compounds for use in bioindustry.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제27권5호
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• pp.424-430
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• 2005

The oral cavity is humid environment mainly due to the continuous salivary flow. The reaction of oral mucosa to fluid flow is important for homeostasis and pathogenesis. The objective of this study is the screening the change of gene expression after the application of fluid induced shear stress (FISS) on the gingival fibroblast using cDNA microarray assay. The immortalized human gingival fibroblasts were grown and FISS was applied using a cone viscometer at a rotational velocity of 40 rpm, respectively for periods of 2 and 4 hours. The synthesis of cDNA was done from the extracted total RNA and cDNA microarray assay was done subsequently. The genes that showed over 1.6 in the Cy3/Cy5 or the Cy5/Cy3 value were regarded as genes influenced significantly by the FISS application ion (/M/>0.7). The " RUNX-1" was increased its expression in 2 hours group and " RUN and SH3 domain containing 1" was increased its expression in 4 hours group. The "CC020415", "cyclin L1", "interferon regulatory factor1", "early growth response 1", "immediate early response 2", and "immediate early response 3" genes were increased their expression in 2 and 4 hours after FISS application. In conclusion, we could find many genes that were probably related to the FISS application. Interestingly, most of them were placed in similar molecular pathways and these findings improve the reliability of chip data and usefulness in overall screening. From this experiment, we could find many items for further study and it will make improvement in the understanding of intracellular events in response to FISS.

• 한국동물학회지
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• 제14권2호
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• pp.75-84
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• 1971

Genetic analysis of a new wing mutant, Surf wings (Srf), was performed. Mutant flies were extracted from a wild population of Drosophila melanogaster at the vicinity of Atomic Energy Research Institute, Seoul in August-September 1969. 1. The distal half of wings of heterozygotes (Srf/+) turned upwards about 40 degree from body axis, but flying ability was not disturbed. They overlap Cy in low frequency when they are grown below $22^{\circ}C$. This resembles with Si or j series, but wing margins are not rolled and diversed. Postscutellars are erected slightly, but they, in general, are not crossed. Any other external pleiotropic effects were not observed. 2. Penetrance and expressivity of both sexes are not complete. Their extents are variable with sex and temperature. These characters show maximum tendencies when the development is made at $22^{\circ}C$ (female: P = 0.996, E = 0.932, male:P = 0.961, E = 0.698). 3. The preliminary locus of Srf was determined to be 66.8 on the right arm of second chromosome by using recessive maker gene cn bw. 4. The homozygous flies(Srf/Srf) have shown perfect lethality. The heterozygotes (Srf/+), on the other hand, have shown to be viable and fertile. Srf chromosomes are kept in a balanced lethal system with Pm chromosomes which are associated with inversions. Hence, it is partially reasonable to suppose that Srf may persist in a natural population by the same mechanism. 5. Allelism test with Cy was also conducted. The fact that combination with Cy in the trans-phase (+ Srf/Cy +) is viable in contrast to the lethality of Srf/Srf and Pm/Pm indicates that Srf and Cy are not functionally allelic.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.224-224
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• 2017

In plants, cysteine(Cys) is decisive for protein and glutathione that acts as an indispensable sulfur grantor for methionine and many other sulfur containing secondary products. Cys formation is involved in the consecutive two reactions using two enzymes-serine acetyl transferase (SAT) and O-acetylserine (thiol)lyase (OASTL) and appeared in plant cytosol, chloroplast and mitochondria. OASTL is able to produce mimosine with 3-hydroxy-4-pyridone (3H4P) in lieu of $H_2S$ for Cys. In this report, we describe the first time cloning, purification and characterization of cytosolic(cy)OASTL from M. pudica and its expression in Escherichia coli and try to find out the cross link between this OASTL and the mimosine formation and to elucidate the metabolic role of cy-OASTL in M. pudica. The purified recombinant protein was 34.7 KDa. The optimum reaction pH and temperature was 6.5 and $50^{\circ}C$, respectively. The Michaelis constant (Km) and the Vmax value of the enzyme was $252{\pm}25{\mu}M$ and $57{\pm}3{\mu}M\;cysteine\;min^{-1}\;{\mu}g\;protein^{-1}$ for sulfide and $159{\pm}21{\mu}M$ and $58{\pm}2.4{\mu}M\;cysteine\;min^{-1}\;{\mu}g\;protein^{-1}$ for OAS subsequently. After cleaving the His-tag, we tried to observe cy-OASTL to form mimosine with appropriate substrate but it was not successful. It may be concluded that cy-OASTL of the present study is only Cys specific, not mimosine.

• 한국균학회지
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• 제49권3호
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• pp.425-425
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• 2021

• 대한화학회지
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• 제33권5호
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• pp.484-495
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• 1989

질소, 산소 주게원자를 가진 리간드(EDTA, DTPA, IDA, CyDTA, OX)와 몰리브덴(V) 착물$[Et_4N)_2[MoOCl_5]$을 반응시켜 이량체 몰리브덴(V)을 합성하였다. 합성한 몰리브덴(V) 착물은 원소분석, 적외선 스펙트럼, 양성자 자기 공명 스펙트럼, 전자흡수 스펙트럼에 의해 구조를 밝혔다. 전기화학적인 환원메카니즘을 추정하기 위하여 pH $3.571∼10.725$인 $CH_3COOH/NaOOCCH_3 Na_2B_4O_7/H_3BO_3,\;NaH_2PO_4/NaOH,\;NaH_2PO_4/Na_2HPO_4, \;NH_3/NH_4Cl$ 완충용액에서 순환전압전류법, 일정전위전기량법, 분광광도법을 이용하였다. Mo-EDTA, DTPA, IDA, CyDTA 착물의 순환전압전류그램에서는 pH가 낮을 때(약 6.00 이하) 두개의 환원파가 나타났으며 제 1환원파에 관련된 전자수는 두개이고 제 2환원파에 관련된 전자수도 두개이다. pH가 높을 때(약 8.00 이상)는 한개의 환원파가 나타났으며 관련된 전자수는 네개이었다. Mo-OX, 착물의 순환전압전류그램은 pH가 약 7.2 이하에서만 얻을 수 있었고 한개의 파가 나타났으며 관련된 전자수는 네개이다.