University of Portsmouth named the UK's most affordable city for students in the Natwest Student Living Index 2016. On Friday 4 May 2018, the University of Portsmouth was revealed as the main shirt sponsor of Portsmouth F.C. for the 2018-19, 2019-20 and 2020-21 seasons. The history of the university dates to 1908, when the Park building opened as a Municipal college and public library. The focus was on chemistry and engineering. The roots of the University can be traced back even further to the Portsmouth and Gosport School of Science and the Arts. Shortly after in the year of 1911 a Student Union
Effective number of codons Effective number of codons Effective number of codons (abbreviated as ENC or "Nc") is a measure to study the state of codon usage biases in genes and genomes. The way that ENC is computed has obvious similarities to the computation of effective population size in population genetics. Although it is easy to compute ENC values, it has been shown that this measure is one of the best measures to show codon usage bias. Since the original suggestion of the ENC, several investigators have tried to improve the method, but it seems that there is much room to improve this measure.