Table 2. Codon and anticodon immediately upstream of the stop codon (−1 position).

Nonsense mutations	Beta 17		DMD 319		APC 1114		APC 1131
Stop codon	UAG		UGA		UGA		UAA
Nucleotide in −1	C	U	C	U	C	U	C	U
Last Amino-acid	GLY	GLY	PRO	PRO	ASN	ASN	CYS	CYS
Codon (5′→3′) in −1	GGC	GGU	CCC	CCU	AAC	AAU	UGC	UGU
Anticodon (3′→5′)	CCG	CCG	GGA	GGA	UUG	UUG	ACG	ACG

Codons at −1 of these sequences are recognized by the same tRNA. In bold, the original nucleotide at −1 position and the Wobble pairing.