Are algal genes in nonphotosynthetic protists evidence of historical plastid endosymbioses?

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Published online 2009 October 20. doi: 10.1186/1471-2164-10-484

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Table 1

Fisher exact tests for top hits to cyanobacteria relative to bacterial control groups.

Group	First hits	Adjusted ratio¹cyano:control	P²
P. ramorum as query

Cyanobacteria	155

Firmicutes	69	1.27	0.06

Actinobacteria	123	1.13	0.17

Proteobacteria	166	0.82	0.96

P. sojae as query

Cyanobacteria	155

Firmicutes	62	1.42	0.01

Actinobacteria	95	1.46	0.002

Proteobacteria	166	0.82	0.96

Thalassiosira as query

Cyanobacteria	263

Firmicutes	51	2.92	5.0e-15

Actinobacteria	45	5.27	5.8e-34

Proteobacteria	162	1.43	0.0003

Phaeodactylum as query

Cyanobacteria	231

Firmicutes	46	2.85	5.8e-13

Actinobacteria	63	3.29	3.3e-20

Proteobacteria	166	1.23	0.044

¹Ratios of top hits are based on scaled proportions of total dataset sizes.

²P values that are significant after adjustment for multiple tests are shown in bold.

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