I68, H69, V70, S71, G72, T73, N74, G75, T76, K77, R78, S98, I100, C136, D138, F140, G142, Y143, H144, K145, N146, N147, K148, S149, W150, M151, E152, S153, E154, F155, R156, N183, F184, A241, L242, H243, R244, S245, Y246, L247, T248, P249, G250, D251, S252, S253, S254, G255, W256, T257, A258, G259, A260