Question about numbering TCR with Aho

[violet-sto]

Hi,

Thanks for your excellent work! I have some trouble aligning TCR with Aho. For antibodies, I noticed that for heavy chains, the length is 149, while for light chains, the length is 148. However, for TCRs, the length of the alpha chain is 149, while that of the beta chain is 148. I thought the heavy chain of the antibody should correspond to the beta chain of the TCR. Could you please explain the reason for the inconsistency?

Best regards.