200


C


100 _ur bMur b no apparent similarity


 90 -1 E coi blquer b
 E coiblquer b'
 80 E. coli b/merged query b' I %IMt~% smlrt


 70


 60


 50-


 40-


 30-


 20-


 10-


 'hodowrillum Cyanotetertum Cyanop/ora Odontella Antitham n cn Galdieric Spinacia
 rubrum Synechocystis paradoxa sinenals sp. sulphuria o/eracea

Figure 6-3. Sequence alignments of subunits b and b from various species with the b
 subunit of E coli. The E. coli sequence is entirely in bold script. The blue
 star indicates residues that are similar across all of the species. The red arrow
 indicates residues that are identical across all of the species. The hyphen
 indicates gaps. Sequences were randomly chosen from the National Center
 for Biotechnology Information (NCBI) database. Residues indicated in red
 bold script in the b and b subunits of the various species are identical to the
 corresponding residue in the E. coli b subunit. Residues indicated in blue are
 similar to the E. coli b subunit. In parenthesis are the percent identity
 followed by the percent similarity. A) Sequence alignment of subunits b and
 b of other species with the b subunit of E coli. B) The b and b subunits of
 each species were merged together so that the identical or most similar amino
 acid (relative to E. coli) replaced nonconserved amino acids. C) Graphical
 representation of sequence alignments.