Spinal foraminal stenosis is the narrowing of the typical neuroforaminal spaces between the vertebrae. The spinal nerve roots exit through these same openings and when the stenotic change is severe, these neurological structures might suffer compression and subsequent dysfunction.erniated discs can bulge into the foraminal opening, compressing the nerve root against the wall of the neuroforamen. This is sometimes called nerve compression, nerve impingement or nerve constriction.
Quick Answer. The enzyme DNA helicase unzips the DNA double helix to allow it to replicate. DNA helicase has a rotation speed of 10,000 rotations per minute and moves ahead of the replication fork. It continuously unwinds the DNA strands to allow DNA polymerase to attached new nucleotide strands.
Restriction enzymes, also known as restriction endonucleases, are enzymes that cut a DNA molecule at a particular place. They are essential tools for recombinant DNA technology. The enzyme scans a DNA molecule, looking for a particular sequence, usually of four to six nucleotides. Once it finds this recognition sequence, it stops and cuts the strands. This is known as enzyme digestion. On double stranded DNA the recognition sequence is on both strands, but runs in opposite directions.