Abstract: An electroporation apparatus and its novel chamber with inlet ports for mixing cells and exogenous material. The inlet ports are oriented in nonparallel to each other immediately adjacent at the same top comer of the first wall of the chamber. The mixing chamber comprises successive wall sections, two curved walls at its bottom; the first curved comer is on the same side of the chamber where the liquids enter the chamber, and directs the liquids to the second curved comer at the opposing side of the chamber, which in turn further redirects the mixing to the first curved corner. The direction of the liquid flow mixture change direction at least twice into the mixing chamber.

Abstract: A synthetic DNA library or a member of a synthetic DNA library of antibodies or fragments of antibody molecules having heavy chain(s) and lacking light chain(s) is described wherein the CDR within variable domains are synthesized using randomly assembled trinucleotide phosphoramidites (trimer phosphoramidites) to eliminate unwanted cysteine amino acids and/or stop codons.

Abstract: Described are polynucleotide sequences that encode peptide affinity tags with the surprising property that all of the possible out-of-frame peptide sequences are identical to each other, yet are distinct from the in-frame encoded peptide tag. The present invention includes peptide affinity tags incorporated in expressed proteins. Also described are ligands and antibodies that recognize the in-frame peptides and separate ligands or antibodies that recognize the out-of-frame peptides.

Abstract: A method of binding a protein to its encoding nucleic acid is disclosed wherein the method of binding is non-covalent at one or more locations between the protein and the encoding nucleic acids.

Abstract: The invention features recombinant viral vectors that take advantage of the activity of picornaviral protein 3A in modulating cytokine secretion and antigen presentation on MHC Class I (MHC I), which in turn provides for modulation of a Th1-mediated immune response to the transfected host cell. Specifically, a recombinant viral vector comprising a sequence encoding picornaviral protein 3A provides for decreased antigen presentation on MHC I and a decreased incidence of Th1-mediated immune response, while a recombinant picornaviral vector that is deficient in protein 3A production provides for increased cytokine secretion, increased antigen presentation on MHC I and increased Th1-mediated immune response towards the transfected host cell. The invention also features methods of inducing humoral or cellular immunity using the vectors.

Abstract: The invention features recombinant viral vectors that take advantage of the activity of picornaviral protein 3A in modulating cytokine secretion and antigen presentation on MHC Class (MHC I), which in turn provides for modulation of a Th1-mediated immune response to the transfected host cell. Specifically, a recombinant viral vector comprising a sequence encoding picornaviral protein 3A provides for decreased antigen presentation on MHC 1 and a decreased incidence of Th1-mediated immune response, while a recombinant picornaviral vector that is deficient in protein 3A production provides for increased cytokine secretion, increased antigen presentation on MHC and increased Th1-mediated immune response towards the transfected host cell. The invention also features methods of inducing humoral or cellular immunity using the vectors.