Detection of the X gene product of simian T-cell leukemia virus

The gene product of the X region was examined in simian lymphoid cell lines producing simian T-cell leukemia virus (STLV), which is closely related to human T-cell leukemia virus (HTLV). By use of specific antibodies against pX peptides of HTLV-I, a protein of 41 kDa was identified as a pX product of STLV.