Bioss offers over 11,000 different primary antibodies. A primary antibody is an immunoglobulin that binds specifically to a particular protein or molecule of interest for the purpose of purifying or detecting and measuring it. We offer both polyclonal and monoclonal antibodies raised in rabbit, mouse, and goat. Polyclonal antibodies are able to recognize multiple epitopes on and antigen, making them more tolerant of minor changes in the antigen sequence. Monoclonal antibodies are made to be specific to a single epitope and can provide a stable long term supply when produced by hybridomas in vitro. Our primary antibodies are also made available conjugated to various fluorescent dyes, HRP, or Biotin.