An approximately 4.0 kb of the coding region in exon 2 was replaced by an intra-ribosomal entry site IRES-lacZ-pA cassette followed by a loxP flanked PGKneobpA cassette. RT-PCR indicated that only sequence 5' of the deleted region was present in transcripts. This truncation eliminates all nuclear localization regions and the PHD domain. (J:98073)