| The field codes found in a SWISS-PROT (or TrEMBL) sequence flat file are used to help arrange the information for human readabilty and machine-based parsing. There are several SWISS-PROT field codes found in a sequence flat file; they are represented by two-letter abbreviations. Table 3-1 summarizes the contents of each field code. Table 3-1. SWISS-PROT field definititions | Line code | Content | | ID | Identification | | AC | Accession number(s) | | DT | Date | | DE | Description | | GN | Gene name(s) | | OS | Organism species | | OG | Organelle | | OC | Organism classification | | OX | Taxonomy cross-reference(s) | | RN | Reference number | | RP | Reference position | | RC | Reference comment(s) | | RX | Reference cross-reference(s) | | RA | Reference authors | | RT | Reference title | | RL | Reference location | | CC | Comments or notes | | DR | Database cross-references | | KW | Keywords | | FT | Feature table data | | SQ | Sequence header | | | (blanks) sequence data | | // | Termination line | |