Delangin (NPBL) plays a structural role in chromatin cohesion, likely by interacting with the cohesin comple, Xenopus/Amphibian,. Delangin deficiencies are the cause of Cornelia de Lange syndrome type 1 (CDLS1), which is a heterogeneous developmental disorder associated with malformations affecting multiple systems such as member growth, cognitive retardation, cardiac anomalies. This antibody recognizes the isoform A (long form) of human and mouse delangin in Western blot, immunoprecipitation, immunofluorescent staining and immunohistochemistry.