Epb42^tm1Llp

Sequence from exons 4 through 8 was replaced with a neomycin selection cassette. Northern blot analysis of total reticulocyte RNA and RNase protection assays of nonerythroid tissue samples did not detect message encoded by the targeted allele. Protein was determined to be absent in erythroid cells from homozygous mutant mice via Western blot analysis and Coomassie blue staining. (J:67412)