phorbin

phorbin
The parent hydrocarbon of chlorophyll; differs from porphin (porphyrin) in the presence of an isocyclic ring formed by the addition of a two-carbon group bridging the 13 and 15 positions of porphin (porphyrin) and by saturation of the 17–18 double bond (with realignment of conjugated double bonds). Addition of hydrocarbon side chains in specific locations yields phorbins characterized by prefixes; e.g., phenophorbin.

Medical dictionary. 2011.

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  • phorbin — phor·bin …   English syllables

  • phorbin — rbə̇n noun ( s) Etymology: International Scientific Vocabulary phorb (Greek phorbē pasture, fodder) + in more at pheophorbide 1. : a magnesium free compound C22H18N4 that is the parent of chlorophyll in that it contains the unsubstituted ring… …   Useful english dictionary

  • chlorophyll — The magnesium complex of the phorbin derivative found in photosynthetic organisms; light absorbing green plant pigments that, in living plants, convert light energy into oxidizing and reducing power, thus fixing CO2 and evolving O2; the naturally …   Medical dictionary

  • phorbide — ˈfȯrˌbīd noun ( s) Etymology: phorbin + ide : phorbin 2 …   Useful english dictionary

  • chlorin — 2,3 Dihydroporphin(e); 2,3 dihydroporphyrin; one of the root structures of the chlorophylls (for structure, see porphyrin). Addition of the two carbon bridge (see structure of chlorophyll) to c. yields phorbin(e); addition of side chains yields… …   Medical dictionary

  • pheo- — 1. Prefix denoting the same substituents on a phorbin or phorbide (porphyrin) residue as are present in chlorophyll, excluding any ester residues and Mg. 2. Combining form meaning gray, dark colored. [G. phaios, dusky] …   Medical dictionary

  • porphin, porphine — The unsubstituted cyclic tetrapyrrole nucleus that is the basis of the porphyrins. SEE ALSO: porphyrins. Cf.:chlorin, phorbin, corrin. SYN: porphyrin …   Medical dictionary

  • phyllin — ˈfilə̇n noun ( s) Etymology: phyll + in : a complex magnesium derivative of a porphyrin or a phorbin the phyllin formed from etioporphyrin …   Useful english dictionary

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