Page 230 - Color Atlas of Biochemistry

Biological membranes 221

A. Transport mechanisms
Lumen Epithelial cells Blood

N A Na
PP P

E Na
S
A
PP
M M + P
A + P
PP
A M
PP P
M M
U

1. Facilitated diffusion 2. Active transport 3. Secondary active transport

2
B. Glucose transporter Glut-1 D. Sarcoplasmic Ca pump

Binding N
site for ATP
ATP P Domains
β

N C

Glucose
Blood “Stalk”
Cyto-
plasm
Plasma
membrane
Binding Trans-
sites membrane
for Ca 2 domain
Cytoplasm
SR
Glucose
1. Structure

C. Aquaporin-1 A PP P
Ca 2
A
PP P
A
PP
P
a)
N C
Tubular
lumen H 2 O
d) P b)

Plasma c)
membrane
A
P
PP
Tubule cell 2. Catalytic cycle

Koolman, Color Atlas of Biochemistry, 2nd edition © 2005 Thieme
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