helix

[310 / Pi / left-handed helix]

Backbone structures are obtained using ProteinViewer, where N-terminal is colored red and C-terminal blue.
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Rough characterization of the DSSP code, the PB label, and the 5-tile code is given below.

Type	Backbone structure	DSSP code sequence 5-tile code sequence PB sequence
310		--GGGGGGGGGGGGGGGGG-- --AAAAAAAAAAAAAAAAA-- --MMMMMMMMMMMMMMMMM--
Pi		--IIIIIIIIIIIIIIIII-- --AAAAAAAAAAAAAAAAA-- --MMMMMMMMMMMMMMMMM--
Left-handed (1mic A)		--------------- --00000000000-- --OJAGHJONOPA--
Left-handed (Culled 1mic)		--------- --ORRRR-- (chain A) --LCLMM-- (chain A)

[The DSSP code]

H = alpha helix
B = residue in isolated beta-bridge
E = extended strand, participates in beta ladder
G = 3-helix (3/10 helix)
I = 5 helix (pi helix)
T = hydrogen bonded turn
S = bend
_ = no assigned structure

[The PB label]

A = N-cap beta
B = N-cap beta
C = N-cap beta
D = beta
E = C-cap beta
F = C-cap beta
G = mainly coil
H = mainly coil
I = mainly coil
J = mainly coil
K = N-cap alpha
L = N-cap alpha
M = alpha
N = C-cap alpha
O = C-cap alpha
P = C-cap alpha to N-cap beta

[The 5-tile code]

0 = DDDDD (extended strand, small blue spheres)
1 = DDDDU
2 = DDDUD
3 = DDDUU
8 = DUDDD
9 = DUDDU
A = DUDUD (helix, large red spheres)
B = DUDUU (turn, large yellow spheres)
G = UDDDD
H = UDDDU
I = UDDUD
J = UDDUU
O = UUDDD
P = UUDDU
Q = UUDUD (turn, large yellow spheres)
R = UUDUU (turn, large yellow spheres)