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한국인 인유 ( 人乳 ) 유청단백질의 Sephadex G-150 Gel 여과에 의한 분별 및 아미노산 조성
김우민(W . M . Jeon),정근희(K . H . Chung),김영교(Y . K . Kim) 한국축산학회 1988 한국축산학회지 Vol.30 No.1
This experiment was carried out to study on the fractionation of Korean human whey protein by gel filteration and its amino acid composition. Human whey protein was fractionated by Sephadex G-150 column chromatography using THU buffer and observed by means of polyacrylamide gel electrophoresis. And then percentage yields of each fraction were datermined, and amino acid composition of human whey protein was also analyzed. The results are summarized as follows: 1. Korean human whey protein was separated into four fractions by Sephadex G-150 column chromatography. 2. In polyacrylamide gel electrophoresis, fraction-I was postulated as the mixture of lactoferrin, immunoglobulin and lysozyme, and fraction-II and III appeared as serum albumin and α-lactalbumin, respectively. 3. Percentage yields of fractions were 33.9% for the mixture of LF, IG and lysozyme, 5.6% for serum albumin and 58.2% for α-lactalbumin. 4. Analitical results of amino acid composition of human whey protein indicated that Asp, Ala, Leu and Lys contents in human whey protein were lower than α-lactalbumin in cow`s milk, but Phe contents were higher than that in cow`s milk.