Alexander S, Cibulsky A M, Lerner R A
Differentiation. 1983;24(3):209-12. doi: 10.1111/j.1432-0436.1983.tb01321.x.
The lectin discoidin I from Dictyostelium discoideum requires divalent cations for binding activity. The data indicate that calcium is the preferred ion in vitro. In contrast, the lectin activity of discoidin II is independent of divalent ions.