Genomic fragment containing Ada2b enhancer sequences (-1878bp from the transcription start site) extending to +1782bp to the end of the second exon, followed by the Ada2b-PB isoform.
fertile, with Ada2b1/Ada2bd842, Ada2bPA
Ada2bPA/Ada2bPB rescues Ada2b1/Ada2bd842
Ada2bPB fails to rescue Ada2b1/Ada2bd842