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Purity testing typically uses High Performance Liquid Chromatography to identify the peptide and assess the concentration of the target compound versus impurities

This work was supported by the National Natural Science Foundation of China (grant numbers 82200699 to XC, and 82273560 to LJ), the Yunnan Provincial Science and Technology Program (grant number 202502AS100004 to XW), and the Ningbo City Public Welfare Research Plan Project (grant number 2024S038 to LJ)

We observed no significant changes in the expression of p53 or p21 in keloid lesions or fibroblasts compared to those in normal skin

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