Crosstide is a peptide analog of glycogen synthase kinase-3 (GSK-3) that functions as a natural substrate for Akt/PKB and displays similar specificities towards PKBalpha , PKBbeta and PKB Gamma isoforms. It is also recognized by MAPKAP kinase-1 and p70S6K. The fluorescent and biotinlyated peptides demonstrate similar enzyme activities ; Tested Applications: HPLC; Molecular Weight: 1164.2 Da; Purity: Greater than 98 % purifiedConjugation: Unconjugated