Occurrence of protein structure elements in conserved sequence regions

BMC Structural Biology

Table 4 Helix and strand occurrence in different structural classes

	Conserved	Random	Prediction interval *	Difference	Number of prediction intervals**
Strands
Alpha/beta	2217	1984.4	109.2	-232.6	2.13
Alpha + beta	1556	1465.3	83.3	-90.7	1.09
All alpha	263	343.7	63.3	80.7	1.27
All beta	1666	1427.7	70.1	-238.3	3.40
Helices
Alpha/beta	2127	2262.4	84.5	135.4	1.60
Alpha + beta	1109	1229.2	62.7	120.2	1.92
All alpha	1139	1104.2	37.3	-34.8	0.93
All beta	326	466.43	47.4	140.4	2.97

* Prediction interval was created by the standard deviation of the random sets multiplied by the t value for 21 degrees of freedom.
** The number of prediction intervals that differentiates between conserved regions and the average of random regions. In lines highlighted by bold print the difference was significant with a confidence of at least 95%.

ISSN: 1472-6807