National Center for Biotechnology Information NCBI NLM MEDLINE Molecular bacteria pubmed abstract nih national institutes of health national library of medicine models research support u.s. gov't non-p.h.s. amino acid sequence theoretical molecular conformation binding sites x-ray porphyrins / chemistry* crystallography hemeproteins / chemistry* cytochrome p-450 enzyme system / chemistry peroxidases / chemistry pmid:9533688 pmc1302556 doi:10.1016/s0006-3495(98)74000-7 w jentzen j g ma j a shelnutt cysteine cytochrome c group / chemistry fungi myoglobin / analogs & derivatives myoglobin / chemistry protein conformation*