What is the difference between an esterification and a transesterification. Esterification objective is the formation of an ester by reacting an alcohol and a carboxylic acid. I am more concerned transesterification or reference to a journal article.
You are getting too specific as though these are biological processes. They do not have to be... ANY ester made is an esterification reaction.
So any ester can be transesterified into a different alkyl alkanoate and any carboxylic acid or derivative (even nitriles) can be esterified. See the diagram: