Dyp-19, formerly known as DUF2211, is a transmembrane domain family that is required to orient the neuroblast cells, QR and QL accurately on the anterior-posterior axis: QL and QR are born in the same anterior-posterior position, but polarise and migrate left-right asymmetrically, QL migrating towards the posterior and QR migrating towards the anterior. It is also required, with unc-40, to express mab-5 correctly in the Q cell descendants [1]. The Dpy-19 protein derives from the C. elegans DUMPY mutant, Swiss:P34413.

1: Establishment of left/right asymmetry in neuroblast migration by UNC-40/DCC, UNC-73/Trio and DPY-19 proteins in C. elegans. Honigberg L, Kenyon C; Development. 2000;127:4655-4668. PMID:11023868