+**B7a** is a [Cell Surface Protein](/wiki/Cell_Surface_Protein), a key player in cellular communication. It helps orchestrate the body's [Immune System](/wiki/Immune_System), guiding cells to recognize and respond to their environment.
+## See also
+- [Protein](/wiki/Protein)
+- [Cell Biology](/wiki/Cell_Biology)
+- [Gene](/wiki/Gene)
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