acid-labile sulfur

Refers to sulfido ligands, e.g., the bridgingligands in iron-sulfurproteins, which are released as H2S at acid pH.
See also: ferredoxin
Source:
PAC, 1997, 69, 1251 (Glossary of terms used in bioinorganic chemistry (IUPAC Recommendations 1997)) on page 1254