GenBank bac_name URL:http://www.ncbi.nlm.nih.gov/Class/FieldGuide/glossary.html#B A bac_name is a quality that identifies the bacterial artifical chromosome (bac), a large insert cloning vector capable of handling large segments of cloned DNA, typically around 150 kb, which are used in the construction of genomic libraries for genome scale sequencing projects including human, mouse, Arabidopsis, and rice. data about a genbank entry