From Latin per (“through, during”), from Proto-Indo-European *per. per. for each. Admission is £10 per person. to each, in each (used in expressing ratios of units). miles per gallon. beats per minute. (medicine) via (the), by (the), through (the) (followed by Latin name for an orifice).
Per is a Latin preposition which means "through" or "for each", as in per capita. Per or PER may also refer to: Places. IOC country code for Peru. IATA code for Perth Airport in Western Australia. Western Australian Herbarium, official abbreviation. Pér, a village in Hungary. Math and statistics.
The PER1 gene encodes the period circadian protein homolog 1 protein in humans. The PER1 protein is important to the maintenance of circadian rhythms in cells, and may also play a role in the development of cancer. This gene is a member of the period family of genes.
Period (per) is a gene located on the X chromosome of Drosophila melanogaster. Oscillations in levels of both per transcript and its corresponding protein PER have a period of approximately 24 hours and together play a central role in the molecular mechanism of the Drosophila biological clock driving...