Both hormones are nine residues long, and only differ by the amino acids at positions three and eight. Oxytocin possesses Ile-3 whereas vasopressin possesses Phe-3. Both Ile and Phe are hydrophobic amino acids and undergo analogous binding to neurophysins.
Both hormones share a length of nine residues but differ at positions three and eight. Oxytocin has an Ile-3, while vasopressin has a Phe-3. Both Ile and Phe are hydrophobic amino acids that bind similarly to neurophysins.