| CPC C07K 16/2818 (2013.01) [C07K 16/2809 (2013.01); C07K 16/2878 (2013.01); C07K 2317/24 (2013.01); C07K 2317/31 (2013.01); C07K 2317/92 (2013.01)] | 5 Claims |

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1. An antibody that binds to CD28 comprising:
(1) (i) a VH comprising the amino acid sequence of SEQ ID NO:31; and (ii) a VL comprising the amino acid sequence of SEQ ID NO:32;
(2) (i) a VH comprising the amino acid sequence of SEQ ID NO:65; and (ii) a VL comprising the amino acid sequence of SEQ ID NO:66;
(3) (i) a VH comprising the amino acid sequence of SEQ ID NO:99; and (ii) a VL comprising the amino acid sequence of SEQ ID NO:100;
(4) (i) a VH comprising the amino acid sequence of SEQ ID NO:133; and (ii) a VL comprising the amino acid sequence of SEQ ID NO: 134.
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