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.
The RNA strand is processed so that its introns are removed and the exons are pushed together to make a continuous, shorter strand. This process is called RNA splicing. It produces a 'final draft' of the mRNA before translation gets under way.