Map-Based Cloning of CSU1.
(A) Map of the CSU1 locus and CSU1 gene structure. The exon is represented by boxes, and the intron is represented by the line. The interval linked to the mutation was sequenced and the base substitution identified. The mutation in csu1-3 is marked in black with an asterisk.
(B) Mutations identified in the csu1 alleles, and the consequences of mutations to the CSU1 protein.
(C) Protein structure of CSU1. a.a., amino acids.