- Calcium modulates protease resistance and carbohydrate binding of a plant defense legume lectin, Griffonia simplicifolia lectin II (GSII). Zhu-Salzman, K., Hammen, P.K., Salzman, R.A., Koiwa, H., Bressan, R.A., Murdock, L.L., Hasegawa, P.M. Comp. Biochem. Physiol. B, Biochem. Mol. Biol. (2002)