G 1232 (OTTO) Genistein, 95% Cas 446-72-0 - used to selectively target pre B-cells via conjugation with an anti-CD19 antibody. G 1232 (OTTO) Genistein, 95% Cas 446-72-0 - used to inhibitor of tyrosine protein kinase. Genistein inhibits EGF-stimulated phosphorylation in cultured cells.