H-Asn-Pro-Glu-Tyr(PO3H2)-OH is a short phosphorylated peptide incorporating a phosphotyrosine analog. The sequence serves as a defined substrate or recognition motif for SH2-domain and phosphatase studies. Researchers use it to investigate phosphotyrosine-dependent binding and dephosphorylation mechanisms. Its small, well-characterized structure supports kinetic and structural assays.
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