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. Author manuscript; available in PMC: 2022 May 27.
Published in final edited form as: Chem Soc Rev. 2021 Jul 6;50(16):8954–8994. doi: 10.1039/d1cs00240f

Fig. 14.

Fig. 14

Detection of l-histidine using DNAzymes that do not bind l-histidine directly. Reprinted (adapted) from P. Gu, G. Zhang, Z. Deng, Z. Tang, H. Zhang, F. Y. Khusbu, K. Wu, M. Chen and C. Ma, A novel label-free colorimetric detection of l-histidine using Cu2+-modulated G-quadruplex-based DNAzymes, Spectrochim. Acta, Part A, 2018, 203, 195–200, with permission from Elsevier.268