Table 1

GO categories listed for domain families with statistically significant bias (p-value < 0.01) with respect to increasing, decreasing and stable individual spacers.

Decreasing
Stable
Increasing
GO annotation
P-value

6 (9.8)
47 (64.9)
38 (16.3)
transferase activity, transferring glycosyl groups
0.0000
12 (11.2)
52 (74.2)
40 (18.7)
replicative cell aging
0.0000
25 (11.7)
58 (77.7)
26 (19.6)
endoplasmic reticulum membrane
0.0000
24 (20.6)
112 (136.9)
56 (34.5)
positive regulation of cell proliferation
0.0001
0 (11.7)
93 (77.7)
16 (19.6)
ubiquitin cycle
0.0005
14 (32.1)
231 (213.2)
54 (53.7)
membrane fraction
0.0029
5 (8.6)
70 (57.1)
5 (14.4)
chemotaxis
0.0052
0 (8.9)
66 (59.2)
17 (14.9)
ubiquitin-dependent protein catabolism
0.0068
4 (13.5)
91 (89.9)
31 (22.6)
mitosis
0.0074
30 (33.5)
205 (222.5)
77 (56)
transcription
0.0082
2 (8.2)
66 (54.2)
8 (13.6)
protein folding
0.0084
4 (14.9)
111 (99.1)
24 (25)
G-protein coupled receptor protein signaling pathway
0.0089

First three columns show the observed and expected number (in parentheses) of decreasing, stable and increasing spacers for different GO categories. Categories, contributing more than 2/3 of the χ2 value due to excess (in bold) or shortage (in italic) of observed families are highlighted. The last column lists p-value of Pearson χ2-test.

Wolf et al. BMC Evolutionary Biology 2007 7:19   doi:10.1186/1471-2148-7-19