. "Reviewed: Herington, AC, 2011-06-13"^^ . "Reviewed: Waters, MJ, 2011-06-23"^^ . "Authored: Jupe, S, 2010-10-14"^^ . "Edited: Jupe, S, 2011-06-10"^^ . "Human growth hormone (GH) is a heterogeneous protein hormone consisting of several isoforms. The peptide is encoded by 2 genes, GH1 and GH2, both give rise to multiple variant forms. Post-translational modification including oligomerization increases the variation (Baumann 2009). Approximately 14% of circulating human Growth Hormone (GH) is in dimer or oligomer form, this number varying from 0 to 100% (Kublickas et al. 2006). The biological activity of these oligomeric forms is variably diminished when compared to the monomer (Baumann 2009)."^^ . . . . . . . "Growth hormone forms dimers and oligomers"^^ . . .