EurekaMag.com logo
+ Site Statistics
References:
53,214,146
Abstracts:
29,074,682
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Milk carbohydrates of marsupials. II. Quantitative and qualitative changes in milk carbohydrates during lactation in the tammar wallaby (Macropus eugenii)






Australian Journal of Biological Sciences 32(6): 519-531

Milk carbohydrates of marsupials. II. Quantitative and qualitative changes in milk carbohydrates during lactation in the tammar wallaby (Macropus eugenii)

Milk was collected at various stages of lactation from a group of tammar wallabies, M. eugenii, in which parturition was synchronized. The milk carbohydrate was determined by a phenol-sulfuric acid method which was modified to give equal color yields for galactose and glucose. The mean carbohydrate content increased gradually during the 1st 6 mo. of lactation to a peak of 13 g hexose/100 ml of milk, but then fell rapidly to much lower values, over the following 2 mo. Throughout lactation, galactose was the predominant monosaccharide constituent of acid hydrolysates of the milk carbohydrate. Glucose, glucosamine, galactosamine and sialic acid were the only other monosaccharides present. Qualitative changes were investigated by gel filtration and TLC. During the 1st 6 mo. post partum the milk carbohydrate was composed of a variety of oligosaccharides including lactose, but from 8 mo. onwards it consisted mainly of free monosaccharides. From 6-8 mo. an intermediate pattern was observed, i.e., a mixture of lower oligosaccharides and free monosaccharides. In 2 animals which suckled both a new-born pouch young and a young at foot, the mammary gland supplying the new-born secreted milk which was rich in oligosaccharides, whereas that supplying the young at foot produced milk in which the carbohydrates were mainly free monosaccharides, and which had a much lower carbohydrate content.

(PDF 0-2 workdays service: $29.90)

Accession: 000699324

PMID: 549552



Related references

Changes in milk carbohydrates and electrolytes during early lactation in the tammar wallaby, Macropus eugenii. Australian Journal of Biological Sciences, 371-2: 1-6, 1984

Qualitative and quantitative changes in milk fat during lactation in the tammar wallaby (Macropus eugenii). Australian Journal of Biological Sciences 36(5-6): 455-461, 1983

Maternal regulation of milk composition, milk production, and pouch young development during lactation in the tammar wallaby (Macropus eugenii ). Biology of Reproduction 68(3): 929-936, 2003

Changes in milk composition during lactation in the tammar wallaby (Macropus eugenii). Australian Journal of Biological Sciences 33(1): 35-42, 1980

Changes in the milk proteins during lactation in the tammar wallaby, Macropus eugenii. Australian Journal of Biological Sciences 35(2): 145-152, 1982

Lactation in the tammar wallaby macropus eugenii i. milk consumption and the algebraic description of the lactation curve. Journal of Zoology (London) 219(3): 385-398, 1989

Proteomic analysis of early lactation milk of the tammar wallaby (Macropus eugenii). Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics 2(2): 150-164, 2007

Milk consumption in late lactation in a marsupial, the tammar wallaby (Macropus eugenii). Proceedings of the Nutrition Society of Australia 11: 93, 1986

Characterization of N- and O-linked glycosylation changes in milk of the tammar wallaby (Macropus eugenii) over lactation. Glycoconjugate Journal 30(5): 523-536, 2013

Changes in milk protein composition during acute involution at different phases of tammar wallaby (Macropus eugenii) lactation. Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology 151(1): 64-69, 2008