Abstract: The invention provides antibodies against a non-muscular myosin heavy chain type A or a mutant thereof, and F(ab?)2 fragments thereof, as well as a method of treating cancer with such antibodies and F(ab?)2 fragments thereof.

Abstract: Provided is a remedy for cancer which remedy is specific to cancer tissue and has therapeutic effects on mammary cancer. The remedy is available by associating an antitumor substance with a human monoclonal antibody having amino acid sequences of SEQ. ID. NOS. 1, 2 and 3 of Sequence Listing in hypervariable regions of a heavy chain and amino acid sequences of SEQ. ID. NOS. 4, 5 and 6 of Sequence Listing in hypervariable regions of a light chain by attaching the antibody to a liposome having the antitumor substance encapsulated therein.

Abstract: An antigen having a part which is exposed on the surface of a cell at the formation of a tumor mass, and a pharmaceutical composition and a labeling agent comprising a ligand which recognizes the antigen.

Abstract: Provided is a remedy for cancer which remedy is specific to cancer tissue and has therapeutic effects on mammary cancer. The remedy is available by associating an antitumor substance with a human monoclonal antibody having amino acid sequences of SEQ. ID. NOS. 1, 2 and 3 of Sequence Listing in hypervariable regions of a heavy chain and amino acid sequences of SEQ. ID. NOS. 4, 5 and 6 of Sequence Listing in hypervariable regions of a light chain by attaching the antibody to a liposome having the antitumor substance encapsulated therein.

Abstract: Provided is a diagnostic comprising a peptide or protein capable of recognizing at least a portion of a tissue section and a fluorescent substance having the below-described characteristics: i) having, in a predetermined excitation wavelength, an emission wavelength not adjacent to a wavelength region of nonspecific autofluorescence which the tissue section has; and ii) permitting simultaneous observation of the image of the peptide or protein and the image of the tissue section. A diagnostic method and diagnostic kit each of which uses the peptide or protein, and the fluorescent substance is provided. A therapeutic agent administered to a disease after selection of the appropriate agent for the disease by using the above-described method. Also, a tissue section stained by the peptide or protein and the fluorescent substance is provided. In addition, a method of analyzing expression and/or behavior of a protein by using the fluorescent substance is provided.