Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Phylogenetic tree of the catalytic A subunits of molybdopterin oxidoreductases. Abbreviations: Ttr, tetrathionate reductases; Psr/Tsr, polysulfide and thiosulfate reductases; Dmsr, DMSO reductase; Fdh1 and Fdh2, formate dehydrogenases. Numbers at nodes represent the support values estimated by an approximate Bayesian method. The scale bar represents the average number of substitutions per site.
