In this early work, however, the activating effects of the natural ligand, acetylcholine, were not measured and, also, atropine apparently only partially inhibited the receptor. In the current paper, therefore, we recloned this receptor (named A-type mAChR) and found that the cDNA sequence published in Shapiro et al.
At an early age we learn that the color of the water in our lakes, rivers and ponds is blue, but we expect the water in our drinking glass to be clear. When homeowners discover their home drinking water has a slight blue tint, itâs cause for concern. Blue or blue-green water likely means it contains copper.
The water may be reflecting the color of the blue sky (or the reds  of sunset, or the gray of clouds), but an intrinsic blue color is  caused by the refraction and scatterin â¦ g of visible light by the  water.