‘A gene under solid mutational pressure succumbs compared to that pressure,’ Lahn stated. ‘For genes that have a higher mutation rate, selection appears to become less stringent somehow.’ Lahn cannot clarify the system of his findings and expects many will issue this novel selecting. ‘It’s too radical,’ he stated. ‘People simply don’t want to believe it, but the data are there.’ ‘Lahn and his associates have found a most striking result, one that is completely unexpected,’ said geneticist James Crow, professor emeritus of genetics and zoology at the University of Wisconsin-Madison. ‘If this result is indeed confirmed it could cast doubt on usage of this ratio [Ka/Ks] as an indicator of selection.’ Sudhir Kumar, an associate professor of molecular evolution at Arizona Condition University, agreed.‘The LC-NA program is the only brain program involved both in producing fever and controlling behavior,’ says co-writer Dominick P. Purpura, M.D., dean emeritus and distinguished professor of neuroscience at Einstein. The locus coeruleus has widespread connections to mind regions that process sensory details. It secretes most of the brain’s noradrenaline, a neurotransmitter that plays an integral part in arousal mechanisms, like the ‘fight or airline flight’ response. Additionally it is involved in a variety of complex behaviors, such as for example attentional focusing .