![[rsm45.gif|338]] # Ribosomes The ribosome has three sites (EPA): - *Exit* - *Peptidyl* - *Aminoacyl:* Receives tRNAs carrying the next amino acid to be added Can three tRNA ### Inhibiting Ribosome Function ![[Pasted image 20240225062655.png|300]] --- ![[Pasted image 20240225051218.png|300]] - Example of RNA quaternary structure 30S subunit + 50S subunit = 70S ribosome (complete) - 30S is composed of 16S rRNA & 19 proteins - 50S is composed of 23S & 5S rRNA & 31 proteins While it may seem like a tangled mess at first, these rRNA sequences are able to consistently form into these higher level structures by finding the global minimums during folding The protein subunits regulate ribosome initiation, elongation, and termination