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姜興順,林順英,南昌祐,尹錫權,邊時明 同德女子大學校 1995 同大論叢 Vol.25 No.1
To investigate the volatile flavor components of perilla leaves, analyses of kinds of cultivar by GC, GC/MS, UV, IR and NMR were carried out. The results obtained were summarized as follows : 1. The essential oils were extracted with diethyl ether after steam disillation. 2. The identified volatiles include 10 hydrocarbones, 6 alcohols, 3 aldehydes, 2 ketones and 1 miscellaneous components. 3. The major volatile component perilla ketone was identified by UV, IR and NMR spectrum. 4. The perilla ketone were identified in Suwon 8, 19, 21, 23, 24, 25, 26 and purpurea while perillaldehyde was identified in purpurea only.
RNA directed DNA synthesis of defective interfering particle
Byun, Si Myung 생화학분자생물학회 1986 BMB Reports Vol.13 No.4
For the ultimate elucidation of complete nucleotide sequennce of the defective interfering particle(DI particle) of vesicular stomatitis virus (VSV), the complementary double strand DNA (ds cDNA) of single strand RNA (ss RNA) of DI-2 was first synthesized in vitro using a sequential enzymatic reactions (RNA ligase, 5'-kinase, RNA ligase, reverse transcriptase, OH- hydrolysis of RNA-DNA hybrid and reverse transcriptase). The resultant ds cDNA of the DI-2 RNA was confirmed temporarily by size ~tsucrose gradient sedimentation analysis) and hybridization experiment.
Expression of Streptokinase Gene in Bacillus Subtillis
Byun, Si Myung,KIM, SUNG IL,LeevSe Yung 한국유전학회 1989 Genes & Genomics Vol.11 No.4
Streptokinase gene (Skc) containing the promoter and signal sequence was cloned in B. subtilis using the pUB140 plasmid vector. The streptokinase gene was expressed and streptokinase was secreted into culture broth. The coding sequence of the streptokinase gene was also expressed as fused gene using promoter and signal sequence of α-amylase gene from B. subtilis NA64 strain. In this α-amylase secretion vector system, streptokinase activity in culture broth was two to three-fold higher than that with its own promoter and signal sequence.
Nuclear Polyhedrosis Virus of Fall Webworm , Hyphantria cunea ( Drury )
Byun, Si Myung,Choe. Yong Kyung,Lee, Hyung Hoan,Kang, Chil Yong 생화학분자생물학회 1987 BMB Reports Vol.14 No.2
Since the serious attention has given to the use of insect pathogenic viruses for the biological control of insect pests, we tried to isolate the infectious virus from the diseased larvae of fall webworm, Hyphanlria cunea, which is a pest of roadside trees and diciduous trees. The isolated virus was able to succeed in replication of H. cunea virus in an established insect cell line derived from the ovary of adults of cabbage looper, Trichoplusia ni. Based on pathological and morphological properties (by EM pictures), it was found that this virus is included in nuclear polyhedrosis virus (Baculovirus subgroup a). The polyhedral inclusion bodies ranged from 0.6 to 2.5 ㎛ in diameter and rodshaped nucleocapsids were enveloped in multiples of up to 22. Polyhedral protein preparations from H. cunea NPV and A. California NPV (reference virus) were characterized by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). In SDS-PAGE, the major protein component ranged from 28,000 to 29,000 dalton among the isolates. It was also found that the genome of H. cunea was DNA.
Characterization of Glucose 6 Phosphate Dehydrogenase of Leuconostoc mesenteroides
변시명,한문희,최양도 생화학분자생물학회 1985 BMB Reports Vol.11 No.4
Glucose 6-phosphate dehydrogenase of Leuconostoc ntesenteroides No. 20-2-10 which was purified by an affinity chromatography was studied on the characterization, kinetics and chemical modification. Evidences by photooxidation and carbuxymetylation of the enzyme suggested that the imidazole group of histidine with pKa group may participate in the catalytic site.