The following information may help in reformulating a Mouse SNP query that produced no results:.
|Field||Possible reason for no result||Resource suggestion|
|Variation Type||Some variation types (such as MNP and Named) are very rare in dbSNP. There may be no SNPs of these types in the chromosomal region you selected.||Select ANY (the default) under Variation Type. See Interpreting the MGI Mouse SNPs Legend for a description of dbSNP variation types and other SNP information.|
|Gene Symbol/Name||The default action is to search for exact gene symbol matches.|
|There may be SNPs that map close to your gene of interest but that are not in the transcribed region.||Try using the SNPs Located Near Genes section of the query form. Pick a range to find SNPs within a specified distance from your gene and select upstream, downstream or either.|
|Marker Range||You must enter exact official marker/gene symbols and the markers/genes must be on the same chromosome.||Use the MGI Genes and Markers Query Form to find official marker/gene symbols.|