background: genetic polymorphism of milk proteins has been associated with composition, manufacture, and traits of milk. caseins are the most important milk proteins whose genes are strongly linked and inherited as a raceme. κ-casein which is a quantitatively minor constituent of bovine milk is thought to play a critical role in organization, fixation and aggregation of casein micelles and firm...

Point mutations in exon IV of the bovine κ-casein (CSN3) gene determine two allelic variants, A and B. These variants were distinguished by polymerase chain reaction and restriction fragment length polymorphism (PCR-RFLP) analysis in the indigenous Sahiwal and Tharparkar cattle breeds. DNA samples (252 Sahiwal and 56 Tharparkar) were analyzed for allelic variants of the CSN3 gene. Polymorphism ...

Increased productivity in the industry can be achieved by breeding for productive longevity through searching and using genetic markers. The study analysed data of 1476 animals with at least one completed lactation. Depending on linear affiliation kappa-casein gene genotype servicing bulls, their female offspring were divided into 4 groups. CSN3 A allele frequency studied bulls was 81.91%, B 18...

1. Alkaline-earth-metal cations at low concentrations form soluble complexes with bovine caseins. The relative order of binding capacities is: Mg(2+)>Ca(2+)>Ba(2+)>Sr(2+). 2. The cations interact with both free ionized carboxyl groups of aspartic acid and glutamic acid and with monoester phosphate groups covalently bound to serine and threonine; at low concentrations of the cations interactions...

Abstract Genetically engineered chymosin from the tree shrew ( Tupaia belangeri chinensis ) has been obtained and partially characterized for first time. The target enzyme was produced in Escherichia coli , strain BL21(DE3). It shown that recombinant coagulates cow milk Bos taurus ). total specific milk-clotting activity of 0.7–5.3 IMCU/mL 8.8–16.6 IMCU/mg. nonspecific proteolytic relation to b...