the catalase level of bacteroides distasonis ( atcc 8503 , type strain ) varied with the amount of hemin supplied to the medium when the cells were grown in either a prereduced medium containing 0.5 % peptone , 0.5 % yeast extract , and 1 % glucose or in a prereduced , defined heme-deficient medium .
C0018988
hemin
C0018966
heme