To investigate the function of UCHL1, which is highly expressed in gastric cancer according to ShinyThor (https://doi.org/10.1093/bioadv/vbaf061, accessed on 7 September 2025) and Human Protein Atlas (https://www.proteinatlas.org/, accessed on 7 September 2025) databases, we performed knockdown experiments using MKN1 and SNU484 cell lines, both of which show high levels of UCHL1 expression (Figure 2A and Figure S3). Here, UCHL1 is linked to gastric cancer.