Assertion: amino acid's group | /r/CapableOf | form hemiacetal linkage
Facets:
Source sentences:
text: The ring arises from the open-chain form by an intramolecular nucleophilic addition reaction between the aldehyde group (at C-1) and either the C-4 or C-5 hydroxyl group, forming a hemiacetal linkage, −C(OH)H−O−.