title: The serum opacity reaction of Streptococcus pyogenes: general properties of the streptococcal factor and of the reaction in aged serum.
mesh_terms: D001769:Blood; D006358:Hot Temperature; D008074:Lipoproteins / Q000097:blood / Q000378:metabolism; D055095:Optics and Photonics; D013297:Streptococcus pyogenes / Q000201:enzymology / Q000254:growth & development / Q000378:metabolism*
chemical_list: D008074:Lipoproteins