Abstract
Tyrosine phosphorylation is an important post-translational modification of proteins, and its accurate analysis is of vital importance. However, due to limited abundance of tyrosine phosphorylation as well as severe interference of serine/threonine phosphorylation and other phosphate-containing species, approaches that can directly analyse tyrosine phosphorylation on the cell membrane still remain limited. Herein, we report the rational development of molecularly imprinted and cladded Raman nanotags and their successful application in surface enhanced Raman spectroscopy (SERS) imaging of tyrosine phosphorylation on cancerous cells and tissues. The prepared molecularly imprinted and cladded SERS nanotags could specifically recognize phosphotyrosine and thereby allowed for distinguishing phosphotyrosine from other phosphate-containing species on cancerous cells and tissues by SERS imaging. Therefore, the molecularly imprinted and cladded nanotags-based SERS imaging can be a promising tool for tyrosine phosphorylation analysis and tyrosine phosphorylation-related studies, showing great potential for biomedical applications.
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