title: Tuftsin and its analogues. III. Modification of basic amino acid residues in the peptide chain.
abstract: Five tuftsin analogues, containing one or two of the basic amino acid residues, respectively in position: 2, 3, 2 and 4, 2 and 3--of the peptide chain, were synthesized and tested for biologic activity by the Najjar test.
mesh_terms: D000595:Amino Acid Sequence; D055598:Chemical Phenomena; D002621:Chemistry; D007128:Immunoglobulin Fragments / Q000032:analysis; D009842:Oligopeptides / Q000138:chemical synthesis; D013329:Structure-Activity Relationship; D014405:Tuftsin / Q000032:analysis
chemical_list: D007128:Immunoglobulin Fragments; D009842:Oligopeptides; D014405:Tuftsin