Identification of milk species by protein profile after SDS-page

Abstract EN

Human milk as will as non-traditional of protein milk from species mares', ass's, cow, buffalo, goat, sheep and camel were investigated by SDS-PAGE polyacrylamide gel electrophoresis.

The results of human milk proteins showed that whey fraction contains, lactoferrin, secretory IgA (SIgA), serum albumin and a-lactalbumin which represents 22.

8, 10.99, 9.08 and 17.02 respectively.

The investigation will be concern with differentiation of milk species by protein profile.

The majority of proteins in human, mares' and ass's milk proteins are found in the whey fraction and represented by five proteins ; a-lactalbumin, lactoferrin, Secretory IgA (SIgA), Serum albumin and Lysozyme.

While the major whey proteins in the other species (cow, buffalo, goat and sheep) represented by four proteins; lactoferrin, Secretory IgA (SIgA), Serum albumin and pMactoglobulin.

The major similarity between species were identified between mares' and ass's as well as human milk proteins especially in the appearance of lysozyme and a-lactalbumin in high concentration.

These observations encourage the possibility of using these milks as alternative of human milk.