Amino Acid Sequence of Chromatiwn vinosum Ferredoxin: Revisions1

Abstract

Reexamination of the amino acid sequence of Chromatium vinosum ferredoxin revealed that the original sequence proposed in 1970 (7) should be revised. Two segments in the sequence, residues 50–52 and residues 53–57, should be mutually displaced and therefore, the correct sequence in this region is concluded to be -Val-Glu-Val-Cys-Pro-Val-Asp-Cys-(residues 50–57). Another correction was the addition of one isoleucine residue between residues 57 and 58- and therefore, the total number of residues should be 82 instead of 81 originally counted. Sequence studies of other portions confirmed the previous results.