Phenotypes

The causative mutation for this disorder was discovered via the candidate gene approach. Tassi et al. (1984) reported a 10-15-fold decrease in the concentration of TG mRNA in affected cattle; Ricketts et al. (1985) reported the use of S1 nuclease assays and electron microscopy to narrow down the location of the mutation to the junction of exon 9 and intron 9; and Ricketts et al. (1987) reported the use of cloning and sequencing of genomic DNA ...