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2 CELLS
Cell Division
Packaging DNA
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What is the bulk of DNA formed of?
proteins
involved in
packaging
the
DNA
ONE OF THESE PROTEINS
IS
CALLED HISTONE
What is histone?
A
positively charged protein
containing
high concentrations
of
amino acids
with
additional base groups
(
-NH2
) eg
lysine
and
arginine
What is DNA wrapped around?
histones
DNA is wrapped around
histones
This process continues to
repeat
and the
bead
like
thread coils
up to form
CHROMATIN
These coils then
loop
again around a
scaffold protein
made of
non-histone fibre
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