04 June 2019
Vol 12, Issue 584

About The Cover

Cover image expansion

Online Cover This week features a Research Article that examined the binding and activity profiles of a range of corticosteroids and steroid hormones for the mineralocorticoid receptor (MR) of the elephant shark, a cartilaginous fish found in the oldest group of jawed vertebrates. These studies suggest that elephant shark MR is activated by progesterone, implying that the MR may play an unappreciated role in reproductive physiology. The image shows an elephant shark (Callorhinchus milii). [Image: Kelvin Aitken/VWPics/Newscom]