4.4.1.17 Deuterohemin r; reversible inhibition 4.4.1.17 hemin at concentrations higher than 0.002 mM; at higher concentrations 4.4.1.17 Holocytochrome c competitive inhibition 4.4.1.17 N-ethylmaleimide kinetics, in vivo; pretreatment of reticulocyte lysates with N-ethylmaleimide results in nearly complete inactivation