>1xr3B (B:) SEQRES residues
matqdsevalvtgatsgigleiarrlgkeglrvfvcargeeglrttlkelreagveadgr
tcdvrsvpeiealvaavverygpvdvlvnnagrpgggataeladelwldvvetnltgvfr
vtkqvlkaggmlergtgrivniastggkqgvvhaapysaskhgvvgftkalglelartgi
tvnavcpgfvetpmaasvrehysdiwevsteeafdritarvpigryvqpsevaemvayli
gpgaaavtaqalnvcgglgny