Serum reagent CWPS

antibodyantiserumfor research

All pneumococci have a cell wall polysaccharide (CWPS) which is species specific and, as the name suggests, is found on the cell wall. CWPS consists of phosphorylcholine. CWPS may sometimes be concealed beneath the capsule around the pneumococcus. Product description CWPS antiserum is produced by immunising rabbits with a pneumococcal strain without a capsule. The product is supplied in a vial with 1 mL ready-to-use antiserum, sufficient for approx. 300 tests. Many years of experience producing Pneumococcus antisera High quality All absorbed free of cross-reactions We offer experienced technical support How to use Equal quantities of antiserum and bacterial culture are mixed on a slide. Under a phase contrast microscope or on a slide, a positive reaction is indicated by agglutination. If the CWPS is concealed beneath the capsule around the pneumococcus, no reaction is seen. F.A.Q. Click the question to get your answer Can I freeze the antibodies? Antibodies can be frozen, but the process of freezing and thawing is damaging for the antibodies, and the titer will drop (even though not dramatically) due to decomposition. We have not made further studies on this, and cannot guarantee the stability of the sera, but we have experienced that mostly the titer stays at the same level if a serum is only frozen and thawn once.