The middle structure shows each chain of the complex in a different color. The left structure shows the alpha subunit in blue. The right structure shows the beta subunit in blue. The alpha and beta subunits comprise the T cell receptor (TCR). The other proteins in the complex include 2 copies of CD3 zeta, 2 copies of CD3 epsilon, 1 copy of CD3 delta, and 1 copy of CD3 gamma. [Credit: Compilation by Nancy R. Gough, BioSerendipity, LLC from images available in https://www.ebi.ac.uk/pdbe/entry/pdb/6jxr]
The structures were published by Zheng, et al., Structural basis of assembly of the human T cell receptor-CD3 complex. Nature 573 546-552 (2019).
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