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Young-Min Goo,Tae-Won Kim,하선화,Kyoung-Whan Back,Jung-Myung Bae,Yong-Wook Shin,Cheol-Ho Lee,Mi-Jeong Ahn,Shin-Woo Lee 한국식물학회 2009 Journal of Plant Biology Vol.52 No.1
Efforts are being made to identify a parental cultivar suitable for metabolic engineering of potato (Solanum tuberosum L.) that will elevate total carotenoid content or produce a specific type of carotenoid. As an initial step in this search, we performed high performance liquid chromatography analyses and comparisons among gene expression profiles for several cultivars domesticated or bred in South Korea. Here, the dark yellow-fleshed “Golden Valley” contained the highest level of total carotenoids (23.8 μg g−1 dry weight (DW)), which was 1.7- to 3.7-fold higher than those measured in other cultivars. The predominant carotenoids in “Golden Valley” were lutein (40.3% of the total), violaxanthin (29.8%), and β-carotene (8.8%), with only a trace amount of zeaxanthin (0.02%) being detected. Levels of lutein and β-carotene in that cultivar were significantly higher than in the others. Interestingly, relatively high amounts of violaxanthin were accumulated in all cultivars, ranging from 15.9% (1.0 μg g−1 DW in “Jowon”) to 61.7% (8.2 μg g−1 DW in “Dejima”). In accordance with the relatively high content of total carotenoids in “Golden Valley”, remarkably elevated transcripts were also accumulated for most of the genes involved in the carotenoid biosynthetic pathway. In particular, genes encoding enzymes for the first three steps of carotenogenesis—phytoene synthase, phytoene desaturase, and ζ-carotene desaturase—were most actively expressed. A relatively high level of transcript for the carotene hydroxylase (Chy2) gene was detected in all cultivars, including “Jowon”, which had accumulated the lowest amount of total carotenoids. In contrast, almost no transcripts were detected for carotene isomerase (CrtIso) and Chy1 in any of these cultivars. Our preliminary results suggest that “Golden Valley” is an excellent candidate for metabolic engineering that further increases its content of specific carotenoids, e.g., β-carotene and astaxanthin.
양측 고관절 전치환술에서 동시수술과 분리수술의 조기 임상 결과 비교
김훈,신종환,남우동,안기찬,서승석,김영창,최장석,이영구 인제대학교 1998 仁濟醫學 Vol.19 No.1
대퇴골두 무혈성 괴사증은 비교적 흔한 고관절의 병변으로서 반수 이상에서 양측성으로 발생하며 대개 질병이 진행된 상태에서 병원을 찾아오므로 양측에 대하여 고관절 전치환술을 요하는 경우가 많다. 고관절 전치환술의 수술방법이나 재료에 대하여는 많은 연구가 있어왔으나 양측성 고관절 전치환술에 있어 한번의 마취하에 양측 모두 수술하는 경우와 두 번으로 나누어 수술하는 경우에 대한 연구는 많지않다. 이에 저자들은 양측성 고관절 전치환술을 요하는 환자들을 대상으로 동시에 수술한 경우와 분리하여 수술한 경우를 비교 분석하였다. 수술중후의 실혈량과 술후 합병증은 유의한 차이가 없었으나, 동시 수술한 경우 총수술시간과 재원기간이 짧았으며 또한 병원비 역시 적게 소요되는 것으로 나타났다. 이상의 결과들을 바탕으로 양측 고관절에 대하여 고관절 전치환술을 요하는 경우 한번의 마취하에 양측 고관절 전치환술을 시행하는 것이 환자의 경제적인 측면에서 더 유리할 것으로 사료되었다. In this retrospective study, we compared 13 patients who had one stage THRA with 12 patients who had similar bilateral THRA in two stages. Thus we achieved following results. 1.No significant differences in estimated intraoperative blood loss, postoperative hemovac drainage, postoperative complications in the two groups. 2.The one stage bilateral procedure offered advantages over two stage bilateral procedures, including shorter length of hospital stay, shorter operation time and reduced economic costs. In conclusion, these results suggest that one stage procedure might be useful method in total hip replacement arthroplasty.
Seasonal Expression of OMT Gene in Relation to Lignin Biosynthesis in two Popular Species
박영구,박희성,최장원,설일환,정일경,김정화,신동일 한국생명과학회 1998 한국생명과학회 학술발표회 Vol.20 No.-
We analyzed lignin content and expression of OMT gene during growth season in two hybrid poplar species. OMT gene expression was observed mainy in the developing secondary xylem where major quantity of lignin occurs. Lignin content in the xylem tissue increased as plant resumed growth in the spring and reached the highest in the late August. Change in lignin content was concurrent with that of OMT gene expression, indicating OMT is a key enzyme in lignin biosynthesis.
Amino Acid Sequence Homology of Hybrid Poplar O-methyltransferuse Involved in Lignin Biosynthesis
Park, Young-Goo,Sul, Ill-Whan,Shin, Dong-Ill,Park, Jang-Won,Park, Hee-Sung The Korean Society of Plant Biotechnology 2001 Plant molecular biology and biotechnology research Vol.3 No.3
In $\lambda$-Zap II vector system, a cDNA library was constructed for the developing secondary xylem mRNA from hybrid poplar, Populus nigra x maximowiczii. A cDNA clone of 1.5 kb in size, pOMTB1.4 encoding a lignin-bispecific O-methyltransferase was screened by plaque hybridization using a probe of 540 bp cDNA amplified by polymerase chain reaction from the cDNA library and identified by nucleotide sequencing. Its nucleotide sequence contains one open reading frame of 366 amino acids. The deduced amino acid sequence in comparison with that of Populus tremuloides showed the differences of 9 amino acids and revealed 85-99% homology among alfalfa, poplar and aspen.