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. 2020 Jul 12;277:128320. doi: 10.1016/j.matlet.2020.128320

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Fig. 2 — Adsorption of VP2-ep by the modified cellulose microfibers. (a) Structure of VP2-ep. The dotted purple circles indicate the positively charged groups in the epitope. (b) Adsorption model of VP2-ep binding to CEL-PGA-MSN, indicating the interaction between the VP2-ep peptide and the microfibers through the positively charged amino acids and the negatively charged PGA/MSNs. (c) K_d values of VP2-ep to microfibers. K_d is the distribution coefficient of peptides between adsorbed and solution phases (L/kg), calculated as (C₀ − C_e)/(C_microfiber·C_e), where C₀ is the initial VP2-ep concentration in solution, C_e is its equilibrium concentration in solution, and C_microfiber is the microfiber concentration in solution. * indicates significant difference between the groups (P < 0.05). (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)