- The herpes simplex virus type 1 strain 17 open reading frame RL1 encodes a polypeptide of apparent M(r) 37K equivalent to ICP34.5 of herpes simplex virus type 1 strain F. McKay, E.M., McVey, B., Marsden, H.S., Brown, S.M., MacLean, A.R. J. Gen. Virol. (1993)