Compositions of, genetic constructions coding for, and methods for producing multivalent antigen-binding proteins are described and claimed. The methods include purification of compositions containing both monomeric and multivalent forms of single polypeptide chain molecules, and production of multivalent...http://www.google.com/patents/US6515110?utm_source=gb-gplus-sharePatent US6515110 - Multivalent antigen-binding proteins
