An isolated antigen-binding protein or antigen-binding fragment thereof comprising one of: an antigen binding region having the amino acid sequence of one of SEQ ID NOS: 5, 8, 10, 13, 14, 17, or 20; an antigen binding region comprising a V H and a V L respectively, with amino acid sequences selected from SEQ ID NOs: (i) 24 and 25; (ii) 26 and 27; (iii) 28 and 29; (iv) 30 and 31; (v) 32 and 33; (vi) 34 and 35 and (vii) 36 and 37; or ( i) the following three light chain complementarity determining regions (CDRs): (a) a LC CDR1 comprising the amino acid sequence of SEQ ID NO: 56; and (b) a LC CDR2 and CDR3 comprising respectively, the amino acid sequence of SEQ ID NOs: 58 and 65, 59 and 66, 60 and 67, 61 and 68, 61 and 69, 62 and 70 and 63 and 71; and (ii) the following three heavy chain CDRs: (a) a HC CDR1 comprising the amino acid sequence of SEQ ID NO: 38; and (b) a HC CDR2 and CDR3 comprising respectively the amino acid sequence of one of SEQ ID NOs: 42 and 50, 43 and 51, 44 and 52, 45 and 53, 46 and 54 and 47 and 55; or (c) a HC CDR1 comprising the amino acid sequence of SEQ ID NO: 39; and (d) a HC CDR2 and CDR3 comprising respectively the amino acid sequence of SEQ ID NOs: 41 and 49; wherein the antigen-binding protein specifically binds to an epitope on an HLA/peptide complex. an antigen binding region having the amino acid sequence of one of SEQ ID NOS: 5, 8, 10, 13, 14, 17, or 20; an antigen binding region comprising a V H and a V L respectively, with amino acid sequences selected from SEQ ID NOs: (i) 24 and 25; (ii) 26 and 27; (iii) 28 and 29; (iv) 30 and 31; (v) 32 and 33; (vi) 34 and 35 and (vii) 36 and 37; or ( i) the following three light chain complementarity determining regions (CDRs): (a) a LC CDR1 comprising the amino acid sequence of SEQ ID NO: 56; and (b) a LC CDR2 and CDR3 comprising respectively, the amino acid sequence of SEQ ID NOs: 58 and 65, 59 and 66, 60 and 67, 61 and 68, 61 and 69, 62 and 70 and 63 and 71; and (ii) the following three heavy chain CDRs: (a) a HC CDR1 comprising the amino acid sequence of SEQ ID NO: 38; and (b) a HC CDR2 and CDR3 comprising respectively the amino acid sequence of one of SEQ ID NOs: 42 and 50, 43 and 51, 44 and 52, 45 and 53, 46 and 54 and 47 and 55; or (c) a HC CDR1 comprising the amino acid sequence of SEQ ID NO: 39; and (d) a HC CDR2 and CDR3 comprising respectively the amino acid sequence of SEQ ID NOs: 41 and 49; wherein the antigen-binding protein specifically binds to an epitope on an HLA/peptide complex. ( i) the following three light chain complementarity determining regions (CDRs): (a) a LC CDR1 comprising the amino acid sequence of SEQ ID NO: 56; and (b) a LC CDR2 and CDR3 comprising respectively, the amino acid sequence of SEQ ID NOs: 58 and 65, 59 and 66, 60 and 67, 61 and 68, 61 and 69, 62 and 70 and 63 and 71; and (a) a LC CDR1 comprising the amino acid sequence of SEQ ID NO: 56; and (b) a LC CDR2 and CDR3 comprising respectively, the amino acid sequence of SEQ ID NOs: 58 and 65, 59 and 66, 60 and 67, 61 and 68, 61 and 69, 62 and 70 and 63 and 71; and (ii) the following three heavy chain CDRs: (a) a HC CDR1 comprising the amino acid sequence of SEQ ID NO: 38; and (b) a HC CDR2 and CDR3 comprising respectively the amino acid sequence of one of SEQ ID NOs: 42 and 50, 43 and 51, 44 and 52, 45 and 53, 46 and 54 and 47 and 55; or (c) a HC CDR1 comprising the amino acid sequence of SEQ ID NO: 39; and (d) a HC CDR2 and CDR3 comprising respectively the amino acid sequence of SEQ ID NOs: 41 and 49; wherein the antigen-binding protein specifically binds to an epitope on an HLA/peptide complex. (a) a HC CDR1 comprising the amino acid sequence of SEQ ID NO: 38; and (b) a HC CDR2 and CDR3 comprising respectively the amino acid sequence of one of SEQ ID NOs: 42 and 50, 43 and 51, 44 and 52, 45 and 53, 46 and 54 and 47 and 55; or (c) a HC CDR1 comprising the amino acid sequence of SEQ ID NO: 39; and (d) a HC CDR2 and CDR3 comprising respectively the amino acid sequence of SEQ ID NOs: 41 and 49; wherein the antigen-binding protein specifically binds to an epitope on an HLA/peptide complex.