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. Author manuscript; available in PMC: 2019 Mar 6.
Published in final edited form as: Cell Metab. 2017 Dec 14;27(3):513–528. doi: 10.1016/j.cmet.2017.11.002

Figure 2. Uptake of NMN and NR in vivo.

Figure 2

Extracellular conversion and degradation of NMN and NR and their possible uptake mechanisms are indicated. See details in the text. eNAMPT, extracellular nicotinamide phosphoribosyltransferase; iNAMPT, intracellular NAMPT; ENTs, equilibrative nucleoside transporters.