tailieunhanh - Báo cáo sinh học: "Different rates of synthesis of whey protein and casein by alleles of the β-lactoglobulin and α locus in cattle -casein s1"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Different rates of synthesis of whey protein and casein by alleles of the β-lactoglobulin and α locus in cattle -casein s1 | 547 Genet. Sei. Evol. 1989 21 547-554 Elsevier INRA Note Different rates of synthesis of whey protein and casein by alleles of the P-lactogfobulin and asl-casem locus in cattle R. Graml1 G. Weiss2 J. Buchberger2 and F. Pirchner1 1 Lehrstuhl fur Tierzucht der Technischen Universităt Mũnchen D-8050 Freising-Weihen-stephan 2 Institut fiir Chemie und Physik der Siiddeutschen Versuchs- und Forschungsanstalt fur Milchwirtschaft der Technischen Universitãt Mũnchen D-8050 Freising-Wethenstephan FRG received 22 March 1989 accepted 28 August 1989 Summary - Quantities of a. 1-caseins and 3-lactoglobulins were determined in milk of 2059 Fleckvieh cows and 1809 Braunvieh cows in Bavaria 6353 milk samples were analysed for a 1-casein and 5355 for 3-lactoglobulin. a i-Cnc homozygotes produced significantly more a i-casein than B homozygotes. The 0-LgA allele showed greater expression both in heterozygotes and in homozygotes than the 3-LgB allele. In heterozygotes the 3-LgA allele produced nearly 50 more whey protein than its homologue. During the spring-summer season a i-CnB appeared to synthesize more relatively than O i-Cnc. Possible causes for this may be a greater rate of expression of the allele or increased phosphorylation during spring-summer producing proportionally more a. 1-casein. cattle - milk protein genes - gene expression - - 3-lactoglobulin Résumé - Synthèse protéique differentielle selon les variants de ớ-lactoglobuline et de la caséine 0 1 chez les bovins. Les quantités de caséine et de 3-lactoglobuline ont été déterminées dans le lait de 2059 vaches de race Fleckvieh et de race Braunvieh de Bavière 6353 échantillons de lait ont été analyses pour la caséine 0 1 et 5355 pour la 0-lactoglobuline. Les individus homozygotes a -Cnc produisent significativement plus de caséine que les individus homozygotes a i-CnB. L expression de 1 allèle 3-LgA est supérieure à celle de 1 allèle fl-LgB chez les individus heterozygotes OU homozygotes. Chez .