l carnitine and telomeroase L-Carnitine activates calcium signaling in human osteoblasts Carnitine Deficiency: What Is It,

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Later work from the same group used GHSR-1a-null mice to show reduced adiposity and insulin resistance [147]

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Although NMR using fluorescent biosensors or optical reporter tags can provide a valuable perspective for identifying the biochemistry of living cells, it, like the MS based approach, is of limited use for in situ tracking of metabolic processes (Lerche et al., 2015), due to the inherent physicochemical properties of small and hydrophilic metabolites, such as low ionisation efficiency and high detection limits (Chalcraft et al., 2009