For each BAC, the External DB column is linked to AtDB, and the GenBank column is linked to the unfinished sequence submission in the HTGS division of GenBank. Size is an estimate of the size of the insert.
Accurate size is entered when complete.
Map Position is either the closest marker, or the YAC from the Goodman physical map. Shotgun Sequencing involves high throughput sequencing of clones in the library to approximately 7-fold coverage. Closure is the process of assembly, editing and gap closure.