Amino Acid Chime Images

Conformational Elements of Proteins Structure
			Src family protein kinase Cartoon Protein G Cartoon Alpha Helix 3-10 helix B-Strand \|\| B-Sheet Anti \|\| B-Sheet Dots H-bond Wht Blu Blk

Usually right-handed
3.6 residues/turn
5.4 A rise/turn
i, i+4 residues form H-bonds
H-bonds || to helical axis
Side chains point outward.

Hbonds not || not || to helical axis
Thinner than a-Helix

Highly extended (F,Y=180)
2 residues/'turn'
6.6 A rise/turn
no intra-hydrogen bonds

Two types, || and anti-||
inter-chain hydrogen bonds
zig-zag pattern
Side chains alternate up-and-down

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