RefSeq alignments (in refGene) as of Jan. 4, 2005

match count hg17 mm5
total unique names 17,429
1 matches 16,858
2 matches 514
3 matches 45
4 matches 8 (incl. NM_010490, (Iap), 4 unique chroms, long introns; also NM_011022, (Ott), chrX:137,500,000-139,500,000)
5 matches 1 (NM_009669, Amy2, chr3:113,600,144-113,800,000)
6 matches 1 (NM_009529; Xmr; chrX:24,500,000-28,200,000)
7 matches
8 matches
9 matches
10+ matches 1 (NM_207243 aligns in 13 places; 12 are alternate alignments of a large exon)