Stop codons are
Terminator Codons : There are three codons which do not code for any paicular aminoacid.They ae "nonsense codons".more correctly termed as PUNCTUATOR OR TERMINATOR CODONS. They mark end of protein synthesis.These three codons are UAA,UAG,and UGA. UGA is a stop codon ,but in special circumstances,it stands for seleno-cysteine. REF :DM VASUDEVAN TEXTBOOK:7th EDITION ;Page no ;599.
UAA
UAG
UGA
UAC
Metabolism of nucleic acids