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Cell membrane
Bioorthogonal
labeling
N 3
O
O
(b)
O
O
P
S
O
O
OH
O
C 13 H 27
O
N
O
OO
S
O P O
O
C 13 H 27
O R 1
N
30
O
O
Biosynthetic
Incorporation
32
O
R 2
O
HN
C 15 H 31
O
O
C 13 H 27
O P O
C 13 H 27
O
N
O P O
O
C 13 H 27
N
O
OH
O
O
31
33
O
29a-c
O
O
O
a :R 1 =O,R 2 =
8
P
O
O
O
O
O
NH 3
14
b :R 1 =H 2 ,R 2 =
O
5
c :R 1 =O,R 2 =
34
O
5
FIGURE 4.8 Strategies for in situ labeling of tagged lipid analogs. (a) Cartoon depicting bioorthogonal labeling of lipids in
complex environment. (b) Structures that have been developed for in situ labeling studies. (See color plate section.)
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