My research is based on separation of Yersinia enterocolitica from raw untreated milk by using magnetic beads or dynabeads following Immunomagnetic separation method (IMS). If any knows about company or organization address who provide commercially available  conjugated Dynabeads with Yersinia antibody for IMS, PLEASE let me know in comments. This is because I contacted to few numbers of company but I did not get commercially available conjugated magnetic beads with antibody. Still I am in urgent looking about magnetic beads.