R-protein

R-pro·tein

(prō'tēn)
A protein produced by the salivary gland that is thought to protect vitamin B12 as it travels through the digestive tract.
References in periodicals archive ?
Although this procedure is not related to the denaturation process, it is common practice to minimize the effects of R-protein, and the IMMULITE 2000 vitamin [B.
12] (including cobinamide), whereas TC-II and R-protein bind both physiologically inactive [B.
R-protein did not interfere in the assay at 1000 ng/L [B.