Eyes on the skin. In the teamâs first experiment, the scientists were looking to see whether UV light instigated a calcium signaling response. They found nothing. But guessing that the skin might sense light like the eyes do, they added retinal, a co-factor of opsin receptors including rhodopsin.
Economy shipping takes 1 to 10 business days within the United States and 11 to 20 business days for international. Exact time depends on how far the package must travel. Standard international shipping takes 5 to 10 days.
Enjoy free economy shipping on orders of $75+ to any address in the 48 contiguous states. Simply add the code to the promotion code field in your shopping cart, just to the left of the checkout button! Offers cannot be combined, one code per order. View Cart.