Southern analysis of genomic DNA showed that this allele does not comprise a deletion of flanking loci, D17Leh119II and D17RP17, as found for alleles Thp and TOrl. Sequencing genomic DNA from the open reading frame revealed a 19 bp deletion of GCACACGGTCTCAGCTGCC predicted to result in a protein truncated at the carboxyl-terminal end. (J:85398)