red cells pretreated with 1.0 mm n-ethylmaleimide ( nem ) or with 1.0 % ( w/v ) sodium nitrite to cause glutathione sulfhydryl blockage and conversion of red cell hemoglobin to methemoglobin ( methb ) , respectively , also showed elevation of hms activity when exposed to 5h6mq .
C0014792
red cell
C0019046
hemoglobin