SEARCH Articles Figures Tables Dielectric constant and rate of nucleophilic substitution Dipolar aprotic and protic solvents, rates of bimolecular substitution reactions Rate and Regioselectivity in Electrophilic Aromatic Substitution Regiochemistry and Relative Rates of Aromatic Substitution Relative Rates for Addition of Substituted Propyl Radicals to AN andS Solvent effects and rate of nucleophilic substitution Substitution rates Synonymous and nonsynonymous substitution rates are correlated with protein structure Synonymous and nonsynonymous substitution rates are correlated with protein structure an intragenic analysis of the Leishmania GP63 genes