title: Evidence for the identification of P-503 with prototetrahydroporphyrin IX.
mesh_terms: D000332:Aerobiosis; D000693:Anaerobiosis; D004171:Diploidy; D005615:Freezing; D007700:Kinetics; D008027:Light; D008928:Mitochondria / Q000378:metabolism; D010084:Oxidation-Reduction; D010100:Oxygen; D010777:Photochemistry; D011166:Porphyrins / Q000032:analysis* / Q000378:metabolism; D012441:Saccharomyces cerevisiae / Q000032:analysis* / Q000166:cytology / Q000378:metabolism; D013053:Spectrophotometry; D013347:Subcellular Fractions / Q000032:analysis; D013997:Time Factors; D014461:Ultracentrifugation
chemical_list: D011166:Porphyrins; D010100:Oxygen