Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Robert Kelly is managing director of XTS ...

The metabolites of vitamins A and D, retinoic acid and 1,25(OH) 2 VD 3, respectively, bind to nuclear receptors and exert potent and specific immunomodulatory effects. 1,25(OH) 2 VD 3 also inhibits ...

The Overnight Express Autoinduction Systems enable regulated protein expression in Escherichia coli without the need to monitor the culture or add inducer during cell growth and are marketed ...

You can't buy a more powerful gaming platform than a tricked-out desktop. Here's everything you need to know, part by part, to pick the right prebuilt gaming PC, plus current favorites culled from PC ...