Whey protein dynamics in goat mammary secretions during colostrum and early lactation periods

The protein composition in goat milk undergoes changes throughout the different lactation periods, displaying distinct characteristics that are influenced by the dynamic nature of protein composition and concentration during the transition from colostrum secretion to mature milk. To evaluate the dyn...

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Bibliographic Details
Published in:Journal of dairy research 2024-02, Vol.91 (1), p.84-88
Main Authors: Raimondo, Raquel F. S., Miyashiro, Samantha I., Birgel Junior, Eduardo H.
Format: Article
Language:English
Subjects:
Animals
Coagulation
Colostrum
Colostrum - chemistry
Electrophoresis
Female
Goats
Immunoglobulins
Lactation
Lactation - physiology
Mammary Glands, Animal - chemistry
Mammary Glands, Animal - metabolism
Milk
Milk - chemistry
Milk Proteins - analysis
Polyacrylamide
Postpartum Period
Protein composition
Proteins
Secretions
Whey
Whey protein
Whey Proteins - analysis
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Summary:The protein composition in goat milk undergoes changes throughout the different lactation periods, displaying distinct characteristics that are influenced by the dynamic nature of protein composition and concentration during the transition from colostrum secretion to mature milk. To evaluate the dynamics of whey proteins of Saanen goats during the colostral phase and the first month of lactation, 110 milk samples from 11 healthy mammary halves of seven Saanen goats were selected through a clinical evaluation. Whey was obtained by rennet coagulation of the mammary secretion. The biuret method determined total protein concentration, and their fractions were identified by 12% dodecyl sulfate-polyacrylamide gel electrophoresis. Maximum concentrations of all protein fractions were observed in the first 12 h of lactation, reducing throughout the study. Modification of the protein predominance was also observed. The transition from colostrum secretion to milk occurred 5 or 7 d postpartum.
ISSN:0022-0299
1469-7629
DOI:10.1017/S002202992400013X