Biology Reference
In-Depth Information
ALA
ALA
ALA
ALA
10
11
12
0'
DV Proto
DV Proto
DV Proto
DV Proto
0'
12
13
DV Mg-Proto
DV Mg-Proto
DV Mg-Proto
DV Mg-Proto
10
11
DV Mpe
0'
12
4VMPR
13
DV Mpe
DV Mpe
DV Mpe
DV Pchlide
a
MV Mg-Proto
0'
POR-A
13
12
DV Pchlide
a
DV Pchlide
a
DV Chlide
a
MV Mpe
4VPideR
MV Mpe
10
4VPideR
11
4VCR
13
12
0'
MV Chlide a
MV Pchlide a
MV Pchlide a
MV Pchlide a
13
MV Pchlide
a
POR-B
10
11
12
15D
MV Chl a
POR-A
MV Chlide a
MV Pchlide b
4VPideR
0'
14
MV Chlide b
MV Chlide a
MV Chlide a
MV Chlide a
11
15D
10
12
0'
MV Chlide b
14
MV Chlide
a
E
MV Chl a
MV Chl a
MV Chl a
11
0'
10
12
MV Chl b
MV Chl b
MV Chl b
MV Chl b
MV Chl b
Fig. 7.4 Biosynthetic routes 10, 11, 0
0
and 12 which are responsible for the formation of DV
Mg-Proto from DV Proto in LMV-DDV-LDMV plant species. These routes are highlighted in
Metabolism of DV Mg-Proto in DMV-LDV-LDMV Plant Species
The specific role of DV Mg-Proto as a precursor of DV Pchlide
a
in DMV-LDV-
LDMV plant species was demonstrated by conversion of exogenous DV Mg-Proto
to MV Pchlide
a
in isolated etioplasts of barley, a DMV-LDV-LDMV. In barley
etioplasts the MV and DV proportions amounted to 16 % DV Pchlide
a
and 84 %
MV Pchlide
a
(Tripathy and Rebeiz
1986
).
7.1.1.2 The Monovinyl (MV) Mg-Proto Pool
MV Mg-Proto has one vinyl group at position 2 and one ethyl group at position 4 of
the tetrapyrrole macrocycle (Fig.
7.5
). The MV nature of the MV Mg-Proto
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