The phytosulfokine (PSK) receptor is capable of guanylate cyclase activity and enabling cyclic GMP-dependent signaling in plants Kwezi L, Ruzvidzo O, Wheeler JI, … Irving HR · J Biol Chem 2011 · J Biol Chem 286(25):22580-8 PSKR1 (Ser/Thr) Ser/Thr kinase Signaling biology PhosphoSens Read the paper View on PubMed