(2S,3R)-2-amino-3-phosphonooxy-butanoic acid

Ca2+/calmodulin binding to PSD-95 mediates homeostatic synaptic scaling down.

NMR Derived Structure of Ca2+ Calmodulin bound to Phosphorylated PSD-95

500 uM [U-100% 13C; U-100% 15N] Calmodulin, 750 uM PSD-95 phosphorylated, 90% H2O/10% D2O

Delaglio, Grzesiek, Vuister, Zhu, Pfeifer and Bax