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Volutin granules
Volutin
granules
are an
intracytoplasmic
storage
form of complexed
inorganic
polyphosphate
, the
production
of which is used as one of the
identifying
criteria
when attempting to
isolate
Corynebacterium
diphtheriae
on
Löffler's medium
.
Polyphosphate
granules
display
the
metachromatic
effect
,
appearing
red
when
stained
with
methylene blue
.
They can also be found in the
cytoplasm
of
Saccharomyces
,
a genus
of
ascomycete
fungi
.