Location of CeRep25B sequences on the physical map. (A) Genetic map of Chromosome III, showing the positions of the cosmids containing CeRep25B sequences and selected genetic markers. (B) Physical map of the two regions of Chromosome III. The short horizontal lines are individual cosmids (only CeRep25B containing cosmids are named). The two short vertical lines represent regions of the physical map that are only contained in YAC clones. The shaded bar represents the genetic map, with known genetic loci given below.