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3'-Hydroxyechinenone
3'-Hydroxyechinenone
is a
keto-carotenoid
pigment
found in
cyanobacteria
and
microalgae
.
Carotenoids
belong
to a larger
class
of
phytochemicals
known as
terpenoids
. The
chemical formula
of
canthaxanthin
is C
40
H
54
O
2
. It is found non-covalently
bound
in the
orange carotenoid protein
, which is a
soluble protein
involved
in
photoprotection
and
non-photochemical quenching
of
photosynthesis
.
