various basic amino-acid homopolymers are also potent , apparently competitive inhibitors of wheat embryo cdpk , namely poly ( l-lysine ) ( ic50 2 nm ) , poly ( l-ornithine ) ( ic50 3 nm ) and poly ( l-arginine ) ( ic50 17 nm ) and also inhibit the leaf cdpks , albeit at higher concentrations .
C0301714
basic amino-acid
C0003765
l-arginine