High-Level Production of a Humanized ImmunoRNase Fusion Protein from Stably Transfected Myeloma Cells

: ImmunoRNases represent a highly attractive alternative to conventional immunotoxins for cancer therapy. Quantitative production of immunoRNases in appropriate expression systems, however, remains a major challenge for further clinical development of these novel compounds. Here we describe a method for high-level production and purification of a fully functional immunoRNase fusion protein from supernatants of stably transfected mammalian cells.