- The genes encoding the peripheral cannabinoid receptor and alpha-L-fucosidase are located near a newly identified common virus integration site, Evi11. Valk, P.J., Hol, S., Vankan, Y., Ihle, J.N., Askew, D., Jenkins, N.A., Gilbert, D.J., Copeland, N.G., de Both, N.J., Löwenberg, B., Delwel, R. J. Virol. (1997)