Dbsnp Allele Frequency

Question

[User 4133]

Does anyone know what the second filed means in this file?

ftp://ftp.ncbi.nih.gov/snp/database/organism_data/human_9606/SNPAlleleFreq.bcp.gz

Answer 1

[Pierre Lindenbaum]

see http://www.ncbi.nlm.nih.gov/projects/SNP/snp_db_table_description.cgi?t=SNPAlleleFreq

snp_id      int     4   1
allele_id   Foreign key to Allele table.    int     4   2
chr_cnt     Count of chromosomes for the allele specified in allele_id.     float   8   3
freq    Frequency of this allele.   float   8   4
last_updated_time       datetime    8   5