FIG. 1.

Alignment of amino acid sequences of Cyt₅₇₉ from the 5-way and UBA genomic datasets. One gene from the 5-way site (5wayCG14-20) and two from the UBA site (UBA8062-147 and UBA8062-372) encode variants of Cyt₅₇₉. Three N-terminal start sites observed by sequencing isolated proteins are indicated in gray, as are the predicted heme binding residues Cys68, Cys71, His72, and Met121 (see model in Fig. 8B). The line above the alignment indicates that portion of Cyt₅₇₉ used for structural modeling. Arrows indicate the N-terminal signal cleavage site and the observed C terminus.