the electron paramagnetic resonance ( epr ) studies of hemoglobin hybrids in which the spin label is attached to either the alpha- or beta-heme ( alpha2slbeta 2 or alpha2beta2sl ) and spin-labeled isolated chains ( alphasl and betasl ) show that : 1 ) alpha- and beta-hemes have different environments in the tetrameric forms of oxy- , deoxy- , and methemoglobins as well as in isolated single chains ;
C0019046
hemoglobin
C0025635
methemoglobins