Wild-type His1 gene in the context of a histone gene repeat tandem array.
Wild-type His2A gene in the context of a histone gene repeat tandem array.
Wild-type His2B gene in the context of a histone gene repeat tandem array.
Mutant His3 gene (amino acid replacement K36R) in the context of a histone gene repeat tandem array.
Wild-type His4 gene in the context of a histone gene repeat tandem array.
A tandem array containing 12 copies of a mutated histone gene repeat unit (each repeat contains one copy of mutant His3 (K36R) and wild type copies of His1, His2A, His2B and His4.