Electrophoretic pattern of cow, buffalo, sheep, goat and camel milk casein (A) and whey protein (B) on SDS-PAGE representing differences in band pattern. The Marker (Fermentas 11-170KDa) was used to identify molecular weight of whey proteins. Lane M, marker; Lane 1, camel casein; Lane 2, goat casein; Lane 3, sheep casein; Lane 4, buffalo casein; Lane 5, cow casein; Lane 6, sodium casein (standard used to identify bands of different milk species); Lane 7, cow whey; Lane 8, buffalo whey; Lane 9, sheep whey; Lane 10, goat whey; Lane 11, camel whey.