There is a diagram from a book titled "Teaching with the brain in mind". The diagram shows
The diagram appears to show that the "creation of memory" involves "messages coded by RNA" moving through an axon and being released into the synaptic gap, whereupon they presumably bind to the receptors on the other side of the synapse.
Unfortunately the book does not seem to provide any sources for this and I have not been able to find any sources corroborating this claim. Can anyone provide any references?