Positive test controls include: Neuro-2a. The target is usually found in the following locations: Nucleus. Immunogen sequence: SPCVTPVSTA THSLSRLHTM LTGLRNAPSE KLEQILRTCS RDPTQAIANR LKEMFEIYSQ HFQPDEDFSN CAKEIASKHF RFAEMLYYKV LESVIEQEQK RLGDMDLSGI LEQDAF