Table II.

Distribution of Secondary Structures and β-Bulges in Different SCOP Classes

Class	Prot (%)	nb res (%)	Residues			Strand nb.	β-Bulge			β-Bulge frequency
			α (%)	β (%)	Coil (%)		Prot β-bulge (%)	(%)	Per str (%)
all − α	16.83	14.45	61.54	2.50	35.96	2399	13.27	0.41	17.92	430
α/β	25.73	36.25	40.43	16.14	43.43	27,874	65.40	1.73	16.00	4461
α + β	22.71	20.63	33.03	19.26	47.71	18,557	85.01	4.14	33.08	11,597
all − β	26.12	21.30	9.51	34.46	56.03	33,448	94.92	7.52	34.67	711
Mult. d.	1.76	3.59	38.35	15.11	46.54	2717	92.96	2.75	26.17	6138
Small	4.90	1.64	14.40	19.36	66.24	1892	59.43	4.62	28.86	546
Memb+	1.96	2.14	50.44	6.93	42.63	819	18.91	1.68	31.62	259
Sum	100.00	100.00	35.08	18.53	46.39	87,706	68.07	3.35	27.53	24,142

Are given the percentage of proteins (prot), the percentage of residues (nb res), the percentage of helical, extended and coil residues (α, β, and coil), the number of β-strands (strand nb.), the percentage of protein with at least one β-bulge (prot β-bulge), the percentage of amino acid assigned as a β-bulge, and the average number of β-bulge per strands (per str.) in each SCOP class. SCOP class mult. d. implies multi domains and memb+ correspond to membrane proteins.