Inhibits chicken myosin light chain kinase with an IC(50) of 8 M. Does not inhibit bovine cAMP-dependent protein kinase or rat protein kinase C. Antibacterial activity against the Gram-positive bacteria B.subtilis, E.faecium and S.aureus. No antibacterial activity against the Gram-negative bacteria E.coli, K.pneumoniae, P.aeruginosa, P.vulgaris, S.sonnei and S.typhosa. No antifungal activity against C.albicans.