The Generic Feature Format Version 3 (GFF3) format was developed after earlier formats, although widely used, became fragmented into multiple incompatible dialects. The GFF3 format addresses the most common extensions to GFF, while preserving backward compatibility with previous formats. GFF3 files are nine-column, tab-delimited, plain text files. Literal use of tab, newline, carriage return, the percent (%) sign, and control characters must be encoded using RFC 3986 Percent-Encoding; no other characters may be encoded. Backslash and other ad-hoc escaping conventions that have been added to the GFF format are not allowed. The file contents may include any character in the set supported by the operating environment, although for portability with other systems, use of Latin-1 or Unicode are recommended.
coding sequence dna sequences dna exon gene gene expression gene feature messenger rna transcription factor binding site prediction