RNA editing is the process by which changes are made to the nucleotide sequence of RNA after it has been transcribed from DNA. This is accomplished by enzymes that target specific sites on the RNA molecule and either add or remove nucleotides, changing the resulting protein that the RNA encodes. Some synonyms for RNA editing might include "post-transcriptional modification," "RNA modification," or "RNA alteration." Each of these terms describes a process by which RNA is changed in some way to produce a different protein product. Other terms that might be used to describe RNA editing include "RNA splicing," "RNA maturation," or "RNA processing." These various terms all describe mechanisms whereby RNA is modified in some way to produce a final protein product that is different from the original DNA sequence.