title: Carbon-13 NMR spectroscopy of tetrapyrroles.
mesh_terms: D002247:Carbon Isotopes; D002708:Chlorella / Q000032:analysis; D002734:Chlorophyll / Q000032:analysis; D003201:Computers; D005069:Evaluation Studies as Topic; D009682:Magnetic Resonance Spectroscopy; D008722:Methods; D008961:Models, Structural; D008968:Molecular Conformation; D011166:Porphyrins / Q000032:analysis*; D011758:Pyrroles / Q000032:analysis*; D012242:Rhodobacter sphaeroides / Q000032:analysis
chemical_list: D002247:Carbon Isotopes; D011166:Porphyrins; D011758:Pyrroles; D002734:Chlorophyll