L-[T.sub.3] is a precursor of L-[T.sub.4] from diiodothyronine, and its biopotency
revealed that it was 3-4 times more potent than L-[T.sub.4].
Retinol is considered to have 100% biopotency
. Beta-carotene is poorly absorbed by the pig, and its efficiency of conversion to vitamin A is low (approximately 16%).
The median in vivo biopotency
(with the 95% confidence intervals) measured by one laboratory was 15 400 (14 200-16 800) IU/mg, whereas in the other laboratory, it was 10 300 (8360-12 600) IU/mg.
Parker's group has proposed reexamining the 10-to-1 ratio of biopotency
for alpha-tocopherol versus gamma-tocopherol because the official numbers come almost entirely from research on animals.
With a motif of arginine phenylalanine-NH2 (RF-NH2) at the carboxyl terminus, each peptide can activate GPR54 with equal biopotency
(Kotani et al., 2001; Oakley et al., 2009).
The expanded facility includes a state-of-the-art biosafety facility access corridor, upgraded infrastructure, class 10,000 labs and equipment for biopotency
, molecular biology and protein chemistry services.
Among them, d-[alpha]-tocopherol has the highest biopotency
. Vitamin E functions as a metabolic antioxidant, preventing the oxidation of biological membranes and lipoproteins.