EXON - is a valid Scrabble word.
Definition of EXON:
- (in Britain) one of four yeomen of the guard who act as commanding officers in the absence of higher authority
- a polynucleotide sequence in a nucleic acid that codes information for protein synthesis and that is copied and spliced together with other such sequences to form messenger RNA compare intron
- any portion of an interrupted gene that is represented in the RNA product and is translated into protein
- within a nucleic acid, a sequence which codes for protein synthesis [n -S]