The carbon cycle is the biogeochemical cycle focused on carbon and how it is sequestered in and moves between different reservoirs in the Earth system. Natural gradients across surface ocean ...

instead, converted to lactate, which is transported out of the glia and into neurons for oxidation. Glutamate and glutamine are interconverted between glia and neurons. Adapted from ref. 136.

GDH, a key enzyme in glutamine catabolism, is expressed in the cytoplasmic membrane of gastric cancer cells and inhibits tumor growth through the Notch signaling pathway (83). Glutamate metabolism ...