TauPeptide (275-305), also known as the R2 domain fragment, represents the second repeat unit of the microtubule-binding domain of the Alzheimer's taupeptide. TauPeptide (275-305) is considered crucial in determining the biochemical characteristics of the complete tau protein.
Cyclin-dependent kinase 5 (Cdk5) is a serine threonine kinase that is predominantly active in neuronal tissues. With p25 or p35, Cdk5 phosphorylates a range of proteins, including histone H1 and tau. Cdk5 substrate is a synthetic peptide (PKTPKKAKKL) corresponding to a sequence of histone H1. It is phosphorylated by Cdk5 with a Km value of 5 μM.
Microtubule-associated protein tau (26-44) is a synthetic peptide with an amino group conjugated to glutamine and a carboxyl group conjugated to lysine.