肽在瘤胃内的代谢和利用.doc
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肽在瘤胃内的代谢和利用,页数 7字数 7360摘要: 微生物蛋白降解作用形成的多肽经过一系列肽酶最终转化为氨基酸,其速度取决于多肽的化学组成和n端结构。大多数情况下,瘤胃肽在栖瘤胃拟杆菌分泌的二肽基肽酶作用下,从多肽n未端释放二肽而不是游离氨基酸。通过抑制栖瘤胃拟杆菌的二肽基肽酶活性或该菌对肽吸收率可以减慢混合瘤胃群落对...
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肽在瘤胃内的代谢和利用
页数 7 字数 7360
摘要:
微生物蛋白降解作用形成的多肽经过一系列肽酶最终转化为氨基酸,其速度取决于多肽的化学组成和N端结构。大多数情况下,瘤胃肽在栖瘤胃拟杆菌分泌的二肽基肽酶作用下,从多肽N未端释放二肽而不是游离氨基酸。通过抑制栖瘤胃拟杆菌的二肽基肽酶活性或该菌对肽吸收率可以减慢混合瘤胃群落对肽的水解速率。肽和氨基酸刺激瘤胃微生物的生长,并且对许多种菌的最佳生长是必需的。纤维分解菌是个例外。当然, 细菌蛋白质合成时利用氨与肽和氨基酸的比例也取决于它们的浓度。
关键词:肽,瘤胃,代谢
参考文献
Chandler-P Forestomach absorption of peptides doesn't destroy nitrogen use model.
Feedstuffs. 1996, 68: 34, 11, 15; 15 ref.
Depardon-N; Debroas-D; Blanchart-G In vitro study of molecular weight,
hydrophobicity and amino acid composition of peptides during breakdown of a casein
hydrolysate by two strains of Prevotella ruminicola. Reproduction,-
Nutrition,-Development. 1998, 38: 5, 567-576; 35 ref.
Gao-Z; Lee-SS; Lu-YA; Kim-HD; Ha-JK Effects of nitrogen sources and amonia
concentrations on the growth rates and cellulolytic enzyme activities of rumen
anaerobic fungus. Korean-Journal-of-Dairy-Science. 1998, 20: 2, 85-96; 47 ref.
页数 7 字数 7360
摘要:
微生物蛋白降解作用形成的多肽经过一系列肽酶最终转化为氨基酸,其速度取决于多肽的化学组成和N端结构。大多数情况下,瘤胃肽在栖瘤胃拟杆菌分泌的二肽基肽酶作用下,从多肽N未端释放二肽而不是游离氨基酸。通过抑制栖瘤胃拟杆菌的二肽基肽酶活性或该菌对肽吸收率可以减慢混合瘤胃群落对肽的水解速率。肽和氨基酸刺激瘤胃微生物的生长,并且对许多种菌的最佳生长是必需的。纤维分解菌是个例外。当然, 细菌蛋白质合成时利用氨与肽和氨基酸的比例也取决于它们的浓度。
关键词:肽,瘤胃,代谢
参考文献
Chandler-P Forestomach absorption of peptides doesn't destroy nitrogen use model.
Feedstuffs. 1996, 68: 34, 11, 15; 15 ref.
Depardon-N; Debroas-D; Blanchart-G In vitro study of molecular weight,
hydrophobicity and amino acid composition of peptides during breakdown of a casein
hydrolysate by two strains of Prevotella ruminicola. Reproduction,-
Nutrition,-Development. 1998, 38: 5, 567-576; 35 ref.
Gao-Z; Lee-SS; Lu-YA; Kim-HD; Ha-JK Effects of nitrogen sources and amonia
concentrations on the growth rates and cellulolytic enzyme activities of rumen
anaerobic fungus. Korean-Journal-of-Dairy-Science. 1998, 20: 2, 85-96; 47 ref.