O-antigen group O:45 polymerase yielding a long O antigen chain length (25 repeat units)
25.0 udcdpglcnac_b1_3_gal_a1_2_fuc_b1_4_rib_a1_3_fucac_b1_4_glc_p ⇌ 24.0 udcpdp_p + OA45__L_p