for comp, factors in {cytosol: cytoplasmic_initiation_factors, mitochondrion: mitochondrial_initiation_factors}.items():
            n = 1
            for factor in factors:
                factor_exp, all_species, all_parameters, all_volumes, all_observables = utils.gen_response_functions(
                    model, beta, 'translation_init_{}'.format(comp.id), 'translation_init_{}'.format(comp.id), comp, [factor])