Table 2. Overlapping data between dbSNP build96 and JSNP Release 6.

Chromosome	JSNP	% Overlapping dbSNPs
1	5799	22.7
2	4321	19.1
3	3227	21.1
4	2227	18.7
5	2840	28.7
6	4834	21.2
7	5478	20.3
8	2040	18.9
9	2090	19.2
10	2255	19.4
11	3332	27.8
12	3860	21.1
13	1044	24.7
14	3069	19.0
15	1933	19.3
16	2818	20.9
17	2805	19.3
18	929	28.0
19	3571	21.2
20	2763	18.5
21	2203	18.5
22	4035	21.3
X	2018	14.3
Y	50	14.0
Multi	1172	29.3
Unknown	3592	15.8
Total	74305	20.9

The JSNP data are those SNPs found to map to an NCBI contig. The ratio is based on the number of SNPs found in both databases, excluding any data from dbSNP derived directly from JSNP submissions. Those SNPs whose flanking sequences match more than one chromosome are included in Multi and those with no match to NCBI contigs are shown in Unknown.