SUMMARY: Transcription factors regulate gene expression by binding to specific 
short DNA sequences of 5-20 bp to regulate the rate of transcription of genetic 
information from DNA to messenger RNA. We present PWMScan, a fast web-based tool 
to scan server-resident genomes for matches to a user-supplied PWM or 
transcription factor binding site model from a public database.
AVAILABILITY AND IMPLEMENTATION: The web server and source code are available at 
http://ccg.vital-it.ch/pwmscan and https://sourceforge.net/projects/pwmscan, 
respectively.
SUPPLEMENTARY INFORMATION: Supplementary data are available at Bioinformatics 
online.