Substituent-dependent demetalation kinetics of natural bacteriochlorophyll (BChl) c and e homologs purified from two green sulfur photosynthetic bacteria was first studied. Separated BChl e homologs, which possessed a formyl group at the 7-position of their chlorin macrocycles, exhibited a significantly slow removal of central magnesium to free-base bacteriopheophytins in acidic aqueous acetone compared with the corresponding BChl c homologs, which possessed a methyl group at the 7-position. Additional methyl groups at the 82-position of both BChl c and e molecules had little effect on the demetalation kinetics. © 2007 Federation of European Biochemical Societies.
Saga, Y., Hirai, Y., & Tamiaki, H. (2007). Kinetic analysis of demetalation of bacteriochlorophyll c and e homologs purified from green sulfur photosynthetic bacteria. FEBS Letters, 581(9), 1847–1850. https://doi.org/10.1016/j.febslet.2007.03.079