swCDPK activity and protein in the endosperm. A, Western-blot analysis of proteins of endosperm of MF, D, and germination stages G0 and G3 using anti-soybean CDPK. B, Ca2+-dependent phosphorylation of histone III-S by proteins of endosperm of MF, D, G0, and stages G1, G2, and G3 of germination. Black bars, 0.0 mm CaCl2; white bars, 0.2 mm CaCl2.