The yellow pigmentation of bull semen and its content of riboflavin, niacin, thiamine and related compounds.
D000818:Animals; D002417:Cattle; D008297:Male; D009525:Niacin / Q000737:chemistry*; D009539:Nicotinic Acids; D010858:Pigmentation; D010860:Pigments, Biological / Q000737:chemistry*; D012256:Riboflavin / Q000737:chemistry*; D012661:Semen / Q000737:chemistry*; D013831:Thiamine / Q000737:chemistry*
D009539:Nicotinic Acids; D010860:Pigments, Biological; D009525:Niacin; D012256:Riboflavin; D013831:Thiamine
NICOTINIC ACID/chemistry; PIGMENTS/chemistry; SEMEN/chemistry; VITAMIN B 1/chemistry; VITAMIN B 2/chemistry