Relation of vitamin D-dependent intestinal calcium-binding protein to calcium absorption during the ovulatory cycle in Japanese quail.

Abstract

SummaryDuodenal CaBP levels and the efficiency of 47Ca absorption by the duodenal segment of ovulating Japanese quail were determined as a function of eggshell formation. No differences in these parameters were noted in quail in which eggs were being calcified and in quail with no egg in the calcification stage. Thus, there is a correlation between the efficiency of Ca absorption and the level of vitamin D-dependent intestinal calcium-binding protein in this physiological state in Japanese quail.