Messenger Ribonucleic Acid (Messenger Rna) (mRna)
Here's your citation in American Psychological Association (APA) format:
Messenger Ribonucleic Acid (Messenger Rna) (mRna). (n.d.). In Alleydog.com's online glossary. Retrieved from: https://www.alleydog.com/glossary/definition-cit.php?term=Messenger+Ribonucleic+Acid+%28Messenger+Rna%29+%28mRna%29