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Porphyrin
English
Noun
porphyrin
A
class
of
heterocyclic
compounds
containing four
pyrrole
rings arranged in a
square
; they are important in
biochemistry
in a form with a
metal
atom
in the central
cavity
(
hemoglobin
with
iron
,
chlorophyll
with
magnesium
etc).
Categories
:
English nouns
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08-19-2006 13:26:44
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