are particularly preferred the multifarious embodiments of immunoassays are known to one skilled in the art so a detailed description will not be provided here a further object of the invention therefore are immunological test procedures that are suited for the quantification detection of u2212 5 u2212 6 u2212 7 propsa in a sample all biological fluids common to one skilled in the art can be used as samples bodily fluids such as whole blood blood serum blood plasma and urine are preferred as samples the u2212 5 u2212 6 u2212 7 propsa is detected particularly preferrably in a sandwich test it has proved particularly advantageous to use a specific antibody to u2212 5 u2212 6 u2212 7 propsa as a specific capture antibody u201c specific u201d is understood to mean in this context that the capture antibody fulfills the specificity requirements described in the screening section a further object of the invention therefore is the use of antibodies to u2212 5 u2212 6 u2212 7 propsa in immunoassays to detect these molecules furthermore it has proven particularly advantageous to use an antibody in the detection of u2212 5 u2212 6 u2212 7 propsa that reacts specifically with free psa an antibody having specificity for free psa is understood to mean that such an antibody does not detect psa molecules that are complexed with u03b11 anti chymotrypsin act the level of u2212 5 u2212 6 u2212 7 propsa proved to be easy to measure using the test system described above critical human serum i e human sera with approximately 4 to approximately.