Immunogen sequence: RMFNRTYKLY SYSYLGLGLM SARLAILGGV EGQPAKDGKE LVSPCLSPSF KGEWEHAEVT YRVSGQKAAA SLHELCAARV SEVLQNRVHR TEEVKHVD. ENTPD6 is similar to E-type nucleotidases (NTPases). NTPases, such as CD39, mediate catabolism of extracellular nucleotides.