“…Milk from Red Danish cows lacks two protein fractions that are present in other breeds (864). Factors affecting milk composition, including breed, loca-tion, season, and stage in the lactation cycle, have been investigated (365,676,677,709,932). Genetically determined variations in milk proteins have been demonstrated in cows (46,394,496,524,862,1114), zebus (47), buffalos (463, 832), sheep (103,287,675), and possibly sows (495).…”