CD8A and tropical spastic paraparesis: These observations are consistent with previous reports on the TCR analysis of the CDR3 region of Tax11-19–specific CD8+ T cells in HLA-A*0201+ HAM/TSP patients that showed conserved motifs of 3 amino acid sequence (PG-G) (23) or 4 sequence (P/G-L-A/R-G) (22).