Table 1

Overview of gene categories

Category

G

Cr

O1

O2

Suggested content of imports


A

+

-

-

-

Recent imports or loss of imports from B

B

+

+

-

-

Less recent imports

C

+

-

+

+

Loss of genes in Cr, or pervasive imports

D

+

+

+

+

Only highly pervasive imports expected


G, genome under consideration; Cr, paired close relative; O1, first outgroup organism; O2, second outgroup organism. +, Present; -, absent.

Hooper and Berg Genome Biology 2003 4:R48   doi:10.1186/gb-2003-4-8-r48

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