NTRK1 and ganglioneuroma: Total TrkA (110kDa plus 140kDa) was, therefore, reduced to 30.9±3.1% in ER membranes (fractions 5 and 6; P = 0.0001, df = 6) and increased to 40.6±4% in GN membranes (fractions 1 and 2; P = 0.0001, df = 6).