Quantitative determination of protein fractions in the colostrum of clinically health dairy cows between the 1st-8th day post partum using agar gel microelectrophoresis
Blauärmel, H.; Krüger, I.
Archiv für Experimentelle Veterinarmedizin 35(3): 381-387
1981
ISSN/ISBN: 0003-9055 PMID: 7283641 Document Number: 177962
Micro-agargel electrophoresis was used to determine normal value patterns in foremilk protein fractions of 50 clinically intact Friesian dairy cows, between the first and eighth days from calving. The average total protein levels recorded from foremilk samples dropped from 10.67 g/100 ml to 4.85 g/100 ml, between the first and fifth days from calving. Four fractions were clearly distinguished by electrophoretic separation. Fractions II (beta-lactoglobulin) and III (alpha-lactalbumin) increased clearly, in the course of lactation, whereas considerable drops were recorded from fractions I (serum albumin) and IV (immunoglobulin). Decline in immunoglobulin levels was from 62 rel. per cent on the first day of lactation to 25 rel. per cent on the third day. Hints are given on drinking diet for calves, and reference is made to qualitative demands on foremilk from other animals than mother.