CREB-1 (Ser 133) is a protein kinase substrate peptide suitable for kinase assays. This is a suitable substrate for PKA: sc-4802 and CaMKII: sc-4807 and MAPKAPK2: sc-4811 and PKCα: sc-4820. Recognition Motif: R-R/K-X-S/T and R-X-X-S/T-V and C/L/F-X-R-X-X-S and K/R-X-S/T.