TABLE 2.

Nucleotide identity and amino acid similarity among the equine APOBEC3 genes and alleles^a

Gene	% nucleotide identity and amino acid similarity of:
	EcA3A1	EcA3A2	EcA3F1	EcA3F2	EcA3C	EcA3H	Allele
EcA3A1	100	85.9	30.3	30.3	41.5	45.7	99.7-100b
EcA3A2	79.0	100	30.0	29.4	39.6	47.7	97.0-100c
EcA3F1	16.2	15.6	100	92.9	46.3	26.4	99.1-100d
EcA3F2	15.9	15.3	85.6	100	45.7	25.2	98.2-100e
EcA3C	30.2	29.0	43.1	42.2	100	34.5	ND
EcA3H	25.9	25.8	12.4	12.4	22.9	100	ND

^aPercent nucleotide identity and amino acid similarity were calculated using sequences from representative clones in the EST database or identified in this study. The percent nucleotide identity is given above the 100% diagonal, and the amino acid similarity is shown in boldface below the diagonal. ND, not determined.

^bBased on 421 bases of exons 1 to 3 from 18 EST clones.

^cBased on 460 bases of exons 1 to 3 from 19 EST clones.

^dBased on 579 bases of exons 2 to 6. Sequences were derived from five unrelated horses by RT-PCR amplification and cloning using EcA3F1-specific primers.

^eBased on 673 bases of exons 2 to 6. Sequences were derived from five unrelated horses by RT-PCR amplification and cloning using EcA3F2-specific primers.