![](https://www.endotext.org/wp-content/uploads/2019/02/etx-testing-protocol-new-renumbered-ch6-fig4.png)
Figure 4: Post-transcription processing of vasopressin and related peptides. The pre-pro-vasopressin is a peptide consisting of 164 amino acids. This pre-pro-hormone is then converted to pro-vasopressin after the removal of the signal peptide and N-linked glycosylation of copeptin. Further processing of pro-vasopressin gives rise to the individual peptides: arginine vasopressin (AVP), neurophysin II (NP II), and copeptin. Image courtesy: Sriram Gubbi, NIDDK, NIH.