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.
Water Tastes Bad. Source of Bad Tasting Water: Water can taste bad for many different reasons. Total dissolved solids (TDS) and the presence of metals such as iron, copper, manganese, or zinc can cause a metallic taste. Fluoride may also cause a distinct bad water taste. Chlorine and chloramines, used by water treatment plants, will often give water a strong musty or bleachy smell. Those who live near the ocean may encounter a salty taste, even when using municipal water.