[BioC] question regarding ncbi gene2accession and annbuilder

[Mark W Kimpel]

i have downloaded gene2accession from the ncbi ftp site with the 
intention of extracting out chromosome start and stop points for mouse 
genes. many genes are annotated with multiple positions. for example 
11287 has 6 different positions. i know there is some uncertainty with 
these annotations, but i had no idea how many multiple positions are 
actually assigned to individual entrez gene ids.

how do annbuilder and biomart determine which is the "best" to use? if i 
want to build my own annotation tables from ncbi, is there a better 
table to download than gene2accession, i.e. something with a one-to-one 
correspondence between genes and chromosomal positions?

thanks,
mark
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Mark W. Kimpel MD  ** Neuroinformatics ** Dept. of Psychiatry
Indiana University School of Medicine

15032 Hunter Court, Westfield, IN  46074

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