The ACE2 (angiotensin-converting enzyme II) receptor - essential for the SARS-CoV-2 entry into the host cell - is also found in the brain.

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The mRNA vaccines do NOT attach to the ACE2 receptor.
According to Moore, antibodies against the coronavirus can prevent infection by binding to the virus spike protein, which can interfere with the process of attaching onto the ACE2 receptor and halt viral entry into the cell.

[link to cornellsun.com (secure)]

They are not the same thing.