The
molecule
blocks
the
cross-linking
of
hexoses
in
the
peptidogylycan
layer
during
wall
formation,
causing
bursting
of
cell.
There
are,
however,
two
major
drawbacks
to
the
use
of
penicillin.
One,
the
anaphylactic
reaction
in
those
who
are
allergic
to
penicillin.
It
causes
swelling
about
the
eyes
or
wrists,
itchy
skin
etc.
Second,
the
evolution
of
some
penicillin
resistant
bacteria,
that
produce
an
enzyme,
penicillinase.
This
converts
penicillin
into
harmless
penicilloic
acid.
Modern
Penicillins
are
mostly
produced
from
Penicillium
notatum
and
P.
chrysogenum.
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