A slow-stop mutation is a type of mutation that occurs in DNA when a base pair substitution changes a codon that encodes for an amino acid to a stop codon. This can result in the premature termination of protein synthesis, which can lead to a nonfunctional or truncated protein. Some synonyms for slow-stop mutation are nonsense mutation, premature termination codon mutation, and truncation mutation. These terms refer to the same type of mutation that causes the termination of protein synthesis before it is complete. This type of mutation can have significant functional consequences, as the truncated protein may not be able to perform its intended role in the body.