//printf("Dist to target (%lf) du nouveau clone : %e (%e) --> %lu\n", env_metabolic_area, indiv->dist_to_target_by_feature(METABOLISM),r_compare,indiv->protein_list().size());
//printf("Dist to target (%lf) du nouveau clone : %lf (%lf) --> %lu\n", env_metabolic_area, indiv->dist_to_target_by_feature(METABOLISM),r_compare,indiv->protein_list().size());