Mutated His4 gene (amino acid replacement K20R) in the context of a histone gene repeat unit.
Df(2L)HisC, His4HisTA.H4K20R has increased mortality during development phenotype, enhanceable by His4r15-4/His4r15-4
Df(2L)HisC, His4HisTA.H4K20R has decreased body size | pupal stage phenotype
Df(2L)HisC, His4HisTA.H4K20R has some die during P-stage phenotype
Df(2L)HisC, His4HisTA.H4K20R has lethal - all die before end of P-stage phenotype
Df(2L)HisC, His4HisTA.H4K20R has majority die during larval stage phenotype