<p>Disclosed are procytotoxins that comprise a latency associated peptide and a cytotoxic peptide, wherein a proteolytic cleavage site is provided between the latency associated peptide and the cytotoxic peptide. Also disclosed are compositions and methods for selectively destroying a target cell. Also disclosed are compositions and methods for treating cancer in a patient. Also disclosed are compositions and methods for providing latency to a cytotoxin.</p>
