corrin

(redirected from Corrin ring)

cor·rin

(kōr'in),
The cyclic system of four pyrrole rings forming corrinoids, which are the central structure of the vitamins B12 and related compounds, differing from porphin (porphyrin) in that two of the pyrrole rings are directly linked (C-19 to C-1).
[fr. core (of vitamin B12 molecule)]

corrin

/cor·rin/ (kor´in) a tetrapyrrole ring system resembling the porphyrin ring system. The cobalamins contain a corrin ring system.

cor·rin

(kōr'in)
The cyclic system of four pyrrole rings forming corrinoids, which are the central structure of the vitamins B12 and related compounds.
[fr. core (of vitamin B12 molecule)]
References in periodicals archive ?
Iron and cobalt are transition metals adjacent in the periodic table, and the porphyrin ring of heme and the corrin ring of cobalamin are both substituted tetrapyrrole rings [11].
In methylcobalamin, a methyl group is bonded to cobalt in the upper axial position, and the lower axial position is occupied by a nitrogen of the dimethylbenzimidazole nucleotide substituent of the corrin ring.