Regulatory
Mechanism
in
Microorganisms
Mechanism
-Enzyme
Induction
:
Negative
Control
Example
-
Induction
of β-galactosidase
Allosteric
Protein -
The
repressor
(
The
Product
of
i-gene
)
Effector -
Inducer
Physiological
Result -
Enzymes
synthesized
only
when
substrate
inducer
is
presnt
in
the
medium
Mechanism
- Catabolite
Repression:
Positive
Control
Example
- Glucose
repression
of β-galactosidase
synthesis
Allosteric
Protein -
CAP
Protein
Effector -
c
-AMP
Physiological
Result -
Allows
cells
to
use
most
favourable
source
of
carbon,regulates
catabolic
rate
