Each file contains the gene calls for all contigs from a metagenome. The file is tab-delimited file with the columns
1. contig
2. start
3. stop
4. partial : 1 if gene is partial, 0 otherwise
5. direction : 'f' if the gene is oriented in the same direction as the contig, 'r' otherwise
6. amino_acid_sequence

start/stop are nucleotide positions that are 0-based and half-open, i.e. the gene spans [start, stop).