Relative abundance of hGH molecular forms in circulation (adapted from Bidlingmaier et al6). The percentages are approximate
| Isoforms | Per cent |
|---|---|
| 22 kDa monomer | 48 |
| 20 kDa monomer | 9 |
| Modified hGH (dimers and oligomers) | 30 |
| Acidic hGH (desaminated and acylated forms) | 7 |
| Fragmented hGH (17, 12, 5, 30 kDa) | Variable |