Table 1.

Drosophila intronic data that is used to derive a GTR model of DNA evolution.

		Sequence 2
		A	G	C	T	total
Sequence 1	A	1363	45	18	54	1480
	G	37	823	9	17	886
	C	21	11	898	32	962
	T	17	11	27	1120	1175
	total	1438	890	952	1223	4503

Pairs of nucleotide for 4503 sites of sequence that has diverged according to a general-time-reversible (GTR) model, from real Drosophila intronic data. The columns are the bases in the first sequence. Here, we chose a long intron from D. simulans and D. melanogaster, aligned them using AVID, then counted the aligned sites regardless of gaps.