frameshift mutation / frame-shift mutation; frameshift. A frameshift mutation is a genetic mutation caused by a deletion or insertion in a DNA sequence that shifts the way the sequence is read. A DNA sequence is a chain of many smaller molecules called nucleotides.
As for Flexeril (cyclobenzaprine) is is not a controlled substance under US, Canadian, or international law. Some drugs used as muscle relaxants ARE controlled substances like Valium and many US states and countries have listed Soma (carisoprodol) as a controlled substance (or prohibited it).
Is methadone a controlled drug?   Methadone is an opiate that is controlled. Under the Scheduled Substances Act (USA) it is Schedule II (also known as CII). This means that is the most dangerous/addictivâ¦e/illegal it can be will still being allowed to be prescribed medically.