Kemptide (Phospho-Ser5) is a phosphoreceptor peptide that is a specific substrate for camp-dependent protein kinase (PKA).

6,8-dihydroxy -1,2,7- trimethoxy -3- methylanthraquinone

cis-4-Hydroxy-D-proline belongs to the class of organic compounds known as proline and derivatives. Proline and derivatives are compounds containing proline or a derivative thereof resulting from a reaction of proline at the amino group or the carboxyl group or from the replacement of any hydrogen of glycine by a heteroatom.