Nomenclature and Italicization: Italicize names of organisms even when when the species is not indicated. Italicize the first three letters of the names of restriction enzyme cleavage sites as in HindIII. Write the names of strains in roman except when incorporating specific genotypic designations. Italicize genotype names and symbols including all components of alleles but not when the name of a gene is the same as the name of an enzyme. Do not use "+" to indicate wild type. Carefully distinguish between genotype (italicized) and phenotype (not italicized) in both the writing and the symbolism.