Fig. 2From: Visualisation of HER2 homodimers in single cells from HER2 overexpressing primary formalin fixed paraffin embedded tumour tissueSchematic representation of the sample preparation method. a Retrieval of a single cell suspension from an FFPE tumour block. The tumour block is first sectioned. The tumour is then macro-dissected and transferred into a tube for single cell retrieval by collagenase and dispase digestion. b HER2 membrane proteins are specifically labelled with Affibody peptides. The cells are then immobilized on a microchip, and streptavidin Quantum Dot (Strept.-QD) is attached. The final step is the coverage of the sample with a graphene sheetBack to article page