Variability of specific activities and specific-activity ratios.
D000818:Animals; D001669:Biochemical Phenomena; D004622:Embryo, Mammalian / Q000378:metabolism*; D004625:Embryo, Nonmammalian; D010758:Phosphorus / Q000378:metabolism*
D010758:Phosphorus
EMBRYO/metabolism; PHOSPHORUS/metabolism