Rabbits are used for polyclonal antibody production by EnoGene. Rabbit antibodies are very stable and can be stored for several days at room temperature. EnoGene adds sodium azide and glycerol to enhance the stability of the rabbit polyclonal antibodies. Anti-human, anti mouse antibodies to highly immunogenic selected peptide sequences are" monoclonal like" since the epitope to which they are directed is less than 35 amino acids long.