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The derivation of the oxygen atoms of the 13(1)-oxo and 3-acetyl groups of bacteriochlorophyll a from water in Rhodobacter sphaeroides cells adapting from respiratory to photosynthetic conditions: evidence for an anaerobic pathway for the formation of isocyclic ring E.
Porra RJ, Schäfer W, Katheder I, Scheer H. Porra RJ, et al. Among authors: katheder i. FEBS Lett. 1995 Aug 28;371(1):21-4. doi: 10.1016/0014-5793(95)00854-3. FEBS Lett. 1995. PMID: 7664876 Free article.
Origin of the two carbonyl oxygens of bacteriochlorophyll a. Demonstration of two different pathways for the formation of ring E in Rhodobacter sphaeroides and Roseobacter denitrificans, and a common hydratase mechanism for 3-acetyl group formation.
Porra RJ, Schäfer W, Gad'on N, Katheder I, Drews G, Scheer H. Porra RJ, et al. Among authors: katheder i. Eur J Biochem. 1996 Jul 1;239(1):85-92. doi: 10.1111/j.1432-1033.1996.0085u.x. Eur J Biochem. 1996. PMID: 8706723 Free article.