DDB1(redirected from XAP-1)
DDB1A gene on chromosome 11q12-q13 that encodes the large subunit of DNA damage-binding protein (a heterodimer composed of a large and a small (DDB2) subunit) that functions in nucleotide-excision repair.
DDB1 mutations have been tentatively linked xeroderma pigmentosum complementation group E (XPE).
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