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.
You may be familiar with what can happen when there is too much iron in well water â the water often has a metallic taste, a reddish-brown color, stains the laundry and makes poor-tasting coffee. An equally common but less understood problem is the infestation of a well and water system with iron bacteria.