reducing , and even eliminating , the extracellular concentration of mg2+ alone caused no change in basal rigf-ii release , while simultaneously decreasing mg2+ and ca2+ results in a marked drop in the secretion of this sm , reaching a nadir of 38 % of controls in the absence of mg2+ ( p less than 0.001 ) .
C0021666
rigf-ii
C0037657
sm