on the blast input page I have to determine if the seq provided is DNA for blastn/blastx and otherwise print an error. apparently NCBI can do it :-p L. Michiel Van Bel wrote:
yeah okay,
but those sequences cannot be distinguished from each other, so i don't really get the problem.
lieven sterck wrote:
no points seppe, because there exists prot seq that can match the same regEx
Sebastian Proost wrote:
lieven sterck wrote:
a perl regex to check whether a sequence is pure DNA or not.
bonus question: what if I also need to allow IUPAC code for DNA.
thx, L.
m/[ATCG]*/i for DNA.
bonus: Add extra IUPAC chars between brackets
-- ============================================================== Lieven Sterck, PhD Tel:+32 (0)9 3313821 Fax:+32 (0)9 3313809 VIB Department of Plant Systems Biology, UGent Bioinformatics and Evolutionary Genomics Division Technologiepark 927, B-9052 Gent, Belgium Email: lieven.sterck@psb.ugent.be Website: http://bioinformatics.psb.ugent.be -------------------------------------------------------------- Algal Genetics Group UMR 7139 CNRS-UPMC Végétaux Marins et Biomolécules (Marine Plants and Biomolecules) Station Biologique Place Georges Teissier, BP74 29682 Roscoff Cedex, France Website: http://www.sb-roscoff.fr/UMR7139/en/genetics.html ============================================================== "Facts are meaningless. You could use facts to prove anything that's even remotely true!" H. Simpson