RT Journal Article SR Electronic(1) A1 Poole Robert, K. A1 Baines Baldev, S. A1 Curtis Sally, J. A1 Williams Huw, D. A1 Wood Paul, M.YR 1984 T1 Haemoprotein b-590 (Escherichia coli); Redesignation of a Bacterial ‘Cytochrome a1’ JF Microbiology, VO 130 IS 11 SP 3055 OP 3058 DO https://doi.org/10.1099/00221287-130-11-3055 PB Microbiology Society, SN 1465-2080, AB A ‘soluble’ fraction from anaerobically grown Escherichia coli contains a haemoprotein with spectral properties, notably an α-band in the reduced form at 585 to 595 nm, similar to cytochrome a 1. Haem extraction of either the soluble preparation or whole cells yields haem b, but not haem a. In view of this, and the spectral similarities of the a 1-like component to well-known high-spin haem b proteins, we propose that the name ‘haemoprotein b-590’ be used to describe this substance and that consideration be given to the applicability of the name to certain other cytochrome a 1-like pigments in bacteria., UL https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-130-11-3055