A
recent
method
of
determining
relatedness
in
bacteria
is
by
determining
the
patter.,
of
regulation
of
biosynthetic
and
dissimilatory
pathways.
For
example,
in
branched
biosynthetic
pathways
leading
to
the
synthesis
of
amino
acids
of
the
aspartate
family
and
aromatic
amino
acids.
the
first
enzyme
of
the
pathway
is
the
site
of
primary
regulation.
In
the
aspartate
family
it
is
aspartokinase
and
in
the
aromatic
amino
acid
pathway
it
is
deoxyarabinoheptulosonic
acid
phosphate
synthetase
(DAHP
synthetase),
In
E.
coli
and
other
related
enteric
bacteria;
there
are
three
isofunctional
aspartokinases
and
three
isofunctional
DAHP
synthetases.
