tokens: Site directed mutagenesis of residues in this domain ( R82A , K85A , K88A , and V89A ) resulted in proteins which failed to transactivate from the HTLV-1 LTR in vivo .
folded_tokens: site direct mutagenesis of residue in this domain ( r82a , k85a , k88a , and v89a ) result in protein which fail to transactivate from the htlv-1 ltr in vivo .