Abstract: Disclosed are antibodies to peptides active in the structuredness of the cytoplasmic matrix test (SCM-factor peptides) and to fragments of the peptides by immunization of antibody-producing animals with the peptides or fragments. Both polyclonal and monoclonal antibodies can be prepared. Particularly useful are antibodies specifically binding the peptides M-I-P-P-E-V-K-F-N-K-P-F-V-F-L-M-I-D-Q-N-T-K-V-P-L-F-M-G-K (SEQ ID NO: 2) and F-L-M-I-D-Q-N-T-K (SEQ ID NO: 3). The antibodies can be labeled and are suitable for performing immunoassays to detect the presence of SCM cancer-recognition factors in cell cultures or body fluids.