Okadaic Acid (spelling?) inhibits PP1A and 2A so most S/T phosphorylation in cells Widely available. Good luck,. Matthew B. Avison, PhD, University of Bristol, UK. sweet_ie wrote in message <35F18196.1FE7 at inter.net.il>... >maybe someone know about general inhibitor of serine/threonine >phosphatases and can tell me about it? >Amikam