2b21 is a 1 chain structure with sequence from Methanococcus voltae. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
RADA_METVO Involved in DNA repair and in homologous recombination. Binds and assemble on single-stranded DNA to form a nucleoprotein filament. Hydrolyzes ATP in a ssDNA-dependent manner and promotes DNA strand exchange between homologous DNA molecules (By similarity).
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.