tokens: A reliable procedure is described for isolating 3H-triamcinolone acetonide ( 3H-TA ) receptor complexes from purified chronic lymphatic leukemia ( CLL ) lymphocyte nuclei , based on the use of carbobenzoxy-L-phenylalanine ( CBZ-L-phe ) to prevent breakdown of hormone-receptor complexes during extraction of nuclei with 0.6M KCl .