DNA a regular expression is used to parse out the header. Tom Atkinson www.funk.co.nz At this time words like cat tag gaut and so forth will end up in the coding. Once I learn the format of a FASTA file then perhaps I can parse out the headers and meta data. Until then.. This is a test pattern for developing AminoSee DNA viewer aminosee.funk.nz AAA AAC AAG AAT ACA ACC ACG ACT AGA AGC AGG AGT ATG CAA CAC CAG CAT CCA CCC CCG CCT CGA CGC CGG CGT GAA GAC GAG GAT GCA GCC GCG GCT GGA GGC GGG GGT TAA TAA TAC TAG TAG TAT TCA TCA TCC TCC TCG TCG TCT TCT TGA TGA TGC TGC TGG TGG TGT TGT TTA TTC TTG TTT NNN