Head activator neuropeptide is a mitogen for mammalian cell lines of neuronal or neuroendocrine origin. Head activator neuropeptide signals by binding GPR37 and stimulates cells to enter mitosis.

PEP-1 peptide, which has 21 amino acid residues, is a known carrier peptide that delivers full-length native proteins in vitro and in vivo.

In cells D-glucose 6-phosphate (G6P) is generated when glucose is phosphorylated by hexokinase or glucokinase or by the conversion of glucose-1-phosphate by phosphoglucomutase during glycogenolysis. G6P lies at the beginning of both glycolysis and the pentose phosphate pathways. It also can be stored as glycogen when blood glucose levels are high.