Picaridin can be used on human skin or clothing to repel mosquitoes, biting flies, ticks, fleas, and chiggers. These products may be pump sprays, liquids, aerosols, or wipes.
Transcription is carried out by a DNA-dependent RNA polymerase that copies the sequence of a DNA strand into RNA. To begin transcribing a gene, the RNA polymerase binds to a sequence of DNA called a promoter and separates the DNA strands.
When a methyl group attaches to a specificspot on a gene â a process called DNA methylation â it can change the gene's expression, turning it off oron, dampening it or making it louder. (See more about DNA.)Epigenetics, DNA: How You Can Change Your Genes, Destiny ...