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. 2023 Feb 16;11(2):458. doi: 10.3390/vaccines11020458

Figure 12.

Figure 12

Scheme depicting the upconversion optogenetic system (UCNs@FA and NIR light) and engineered NIR-light-responsive bacteria (EcN@EL222-TNF) [141]. Reproduced with permissions from Huizhuo Pan et al., Chemical Engineering Journal, Elsevier, 2021.