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Retired NBME 27 Answers

nbme27/Block 4/Question#28 (reveal difficulty score)
To assess antigen-presenting cell function in ...
B7 ๐Ÿ” / ๐Ÿ“บ / ๐ŸŒณ / ๐Ÿ“–
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submitted by โˆ—shak360(20)
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T cells contain 3 important cell surface proteins:

  • TCR (binds antigen-MHC complex)
  • CD3 (associated with TCR for signal transduction)
  • CD28 (binds B7 on APC (antigen-presenting cells such as dendritic cells))
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one does not simply “walk into mordor”
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