The reaction between hemoglobin (Hb) and NO* has been investigated thoroughly in recent years, but its mechanism is still a matter of substantial controversy. We have carried out a systematic study of the influence of the following factors on the yield of S-nitrosohemoglobin (SNO-Hb) generated from the reaction of NO* with oxy-, deoxy-, and metHb: 1) the volumetric ratio of the protein and the ...