HLA-A and tropical spastic paraparesis: Regarding HTLV-1 Tax11-19-specific TCRs which are restricted by HLA-A*02:01, it has been demonstrated that AA-sequence (PG-G) in the TCR-ß CDR3 may be conserved among Tax11-19-specific T-cells (38) and the sequence was observed in the muscle biopsies obtained from a patient with HLA-A*02:01+ HAM (39).