Biotinylated pharmacologically active agents and complexes containing same are disclosed. In particular, biotinylated-chemokines are described. The complexes further include an anti-biotin antibody that selectively binds to biotin. The complex can be dissociated by contact with free biotin. The complexes...http://www.google.com.au/patents/US6869606?utm_source=gb-gplus-sharePatent US6869606 - Biotinylated-chemokine antibody complexes