title: Comparative studies of alpha-lactalbumin and lysozyme: the proteins of kangaroo (Megaleia rufa and Macropus giganteus) and horse (Equus caballus).
abstract: As part of a study of the 'whey' proteins of various mammals, a comparison is made of the alpha-lactalbumins and lysozymes of the kangaroo and horse. In the milk of the red kangaroo (Megaleia rufa) there is only one alpha-lactalbumin and it occurs throughout lactation, but no lysozyme has been detected. There are two alpha-lactalbumins in the milk of the grey kangaroo (Macropus giganteus), one, designated alpha-lactalbumin Zone B, is present throughout lactation; the second, designated alpha-lactalbumin Zone A, is present only in late lactation. One lysozyme is also present. The milk of the horse (Equus caballus) contains one alpha-lactalbumin and at least one lysozyme. Partial amino acid sequences are proposed from sequence determination and from analyses of tryptic peptides compared with the known sequences of other alpha-lactalbumins and lysozymes.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D002417:Cattle; D004592:Electrophoresis, Starch Gel; D005260:Female; D006168:Guinea Pigs; D006736:Horses / Q000502:physiology*; D006801:Humans; D007768:Lactalbumin / Q000032:analysis*; D007774:Lactation; D007614:Macropodidae / Q000502:physiology*; D008394:Marsupialia / Q000502:physiology*; D008892:Milk / Q000032:analysis*; D008970:Molecular Weight; D009113:Muramidase / Q000032:analysis*; D011247:Pregnancy
chemical_list: D007768:Lactalbumin; D009113:Muramidase