Table 1.

Characteristics of three different parallel β-barrels analyzed

PDB	n	S	t	R (Å)	Θ (°)
5BVL	8	8	1	8.5	37
2AO9	9	18	2	14	48
7SC0	11	22	2	15	53

Number of strands (n), shear number (S), register shift (t), barrel radius (R) measured between the farthest α-carbons, and the angle between an individual β-strand and the major helix axis (θ).