Peter and Guru;

[Computing GC]

I'll be working with simple sequence files (FASTA, or even FASTQ,

SFF, etc) rather than BED files, but I'll keep that in mind.

Emboss has some utilities that do this. infoseq and geecee, and
there are also programs for exploring CpG islands:

http://emboss.sourceforge.net/apps/release/6.3/emboss/apps/nucleic_cpg_islands_group.html

Brad
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