Each image has 2 membranes

TOP membrane order (#5):

Lane 1 = Loading dye
Lane 2 = PD AxPD 2
Lane 3 = 18075 AxPD 2
Lane 4 = 581 AxPD 2
Lane 5 = 580 AxPD 2
Lane 6 = PD AxPD 1
Lane 7 = 18075 AxPD 1
Lane 8 = 581 AxPD 1
Lane 9 = 580 AxPD 1
Lane 10 = Marker

BOTTOM membrane order (#6):

Lane 1 = Loading dye
Lane 2 = PD AxPD 4
Lane 3 = 18075 AxPD 4
Lane 4 = 581 AxPD 4
Lane 5 = 580 AxPD 4
Lane 6 = PD AxPD 3
Lane 7 = 18075 AxPD 3
Lane 8 = 581 AxPD 3
Lane 9 = 580 AxPD 3
Lane 10 = Marker