Fluorescence images of 1 mg/mL HEK293 lysate-treated samples on NbCtrl (left) and Nb arrays (right). (a,c,e) Samples kept under vacuum and (b,d,f) under desiccation: (a,b) samples without encapsulation, (c,d) pHEA-encapsulated samples, and (e,f) pTFOA-encapsulated samples. The estimated concentration of UCH37 in 1 mg/mL of cell lysate is 53 pM.21 Scale bars are 2 mm.