Biology Reference
In-Depth Information
O
O
-
HO
P
O
O
O
P
O
O
OH
HO
HO
O
-
pKa 2.1
O
O
-
P
HO
PI 4,5 Bisphosphate
phospholipase C
O
O
-
HO
P
O
O
P
HO
O
O
OH
HO
HO
O
-
O
O
-
P
OH
HO
Diacyl Glycerol
Inositol 1,4,5 Tris Phosphate
FIGURE 5.16
Hydrolysis of PI 4,5-bisphosphate (PIP2) by phospholipase C.
O
H2
H
C
C
O
CH2
P
O
OH
OH
O
-
pKa 2.1
FIGURE 5.17
PG
e
Phosphatidylglycerol.
electron transport and oxidative phosphorylation. While only a minor component of animal
membranes, PG can be the main component of some bacterial membranes and is abundant
in plant membranes. In plants PG comprises about 10% of the thylakoid (photosynthetic)
membrane lipids. In higher plants, PG is unique in that it contains a high proportion of
trans
-3-hexadecenoic acid. This
trans
fatty acid is located exclusively in the
sn
-2 position.
However, its role in photosynthesis is not known.
