Changes of molecular masses of poly(cis-1,4-isoprene) after incubation with recombinant strains of S. lividans strain TK23. The diagram represents GPC elution profiles for residual chloroform-soluble polymers after incubation of synthetic poly(cis-1,4-isoprene) with an average molecular mass (M) of 800 kDa (catalog no. 182141; Sigma-Aldrich, Steinheim, Germany) with recombinant strains of S. lividans strain TK23 harboring plasmid pIJSK::lcpK30, pIJSK::lcpVH2, pIJSK::lcpKb1, or pIJSK for 8 weeks.