Currins and zirrins, two new classes of corrin analogues.
D002844:Chromatium; D003300:Copper; D006863:Hydrogen-Ion Concentration; D013057:Spectrum Analysis; D014466:Ultraviolet Rays; D014805:Vitamin B 12; D015032:Zinc
D003300:Copper; D015032:Zinc; D014805:Vitamin B 12