RAD23B is a protein encoded by the RAD23B gene and is the  is the initial damage recognition factor in GG-NERas well as the assembly of the other core NER factors
UV excision repair protein RAD23 homolog B is a protein that in humans is encoded by the RAD23B gene. The complex of XPC-RAD23B is the initial damage recognition factor in global genomic nucleotide excision repair (GG-NER). The presence of XPC-RAD23B is required for assembly of the other core NER factors and progression through the NER pathway both in vitro and in vivo. 
