Page 80 - Color Atlas of Biochemistry

Peptides and Proteins 71

A. α-Keratin B. Collagen
Right-handed
α helix

Left-handed
3 nm
superhelix
10 nm

Intermediary
filament

Protofilament

C. Silk fibroin

1. Triple helix (section)

1. Spatial illustration

Gly Arg Hyp
Gly Gln Arg
Gly Pro Hyp
Gly Gly
Gly Pro Gln
Ala Ala Gly Ala Arg
0.35 nm Ala Ser 2. Typical sequence Y
Gly
X

Gly Gly

0.57 nm Gly

Gly Gly

Ala Ala

3. Triple helix
2. Front view (view from above)

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