part of cytoplasm glycine reductase complex Complex that possesses glycine reductase activity; usually comprises three subunits, of which two are selenoproteins; the subunits are typically designated selenoprotein A, selenoprotein B and protein C. GO:0030700 Note that this term represents a location and not a function; the activity possessed by this complex is mentioned in the definition for the purpose of describing and distinguishing the complex. The function possessed by this complex is represented by the molecular function term 'glycine reductase activity ; GO:0030699'. cellular_component oxidoreductase complex