Fig. 2

Fields of proBAM and proBed format. A proBed file holds 12 original BED columns (highlighted by a bold box) and 13 additional proBed columns. The proBAM alignment record contains 11 original BAM columns (highlighted by a bold box) and 21 proBAM-specific columns, using the TAG:TYPE:VALUE format. Each row in the table represents a column in proBAM and proBed. The rows are colored to reflect the categories of information provided in the two formats (see color legend at the bottom, the header section of proBAM format is not included here). The rows without any background color in the proBAM table represent original BAM columns that are not used in proBAM but that are retained for compatibility. The last row in the proBAM table indicates the customized columns that could be potentially used