For example, our data show that both membrane metallo-endopeptidase (MME or CD10) and DNA nucleotidylexotransferase (DNTT, also known as terminal deoxynucleotidyl transferase) have distinctively high expression in B cells from ALL patients, but low expression in B cells from CLL patients (Fig. 2C). Here, MME is linked to B-cell chronic lymphocytic leukemia.