I'm having trouble more details information on how the messenger-RNA based vaccines work. They appear to transcribe proteins in the cytoplasm. I think the fear

I'm having trouble more details information on how the messenger-RNA based vaccines work. They appear to transcribe proteins in the cytoplasm. I think the fear is that these vaccines may contain some combination of Reverse Transcriptase and Integrase enzymes. Do they contain these enzymes? If not, do they simply try to get your cells to create spike proteins?