NAA40 and squamous cell carcinoma: We further examined expression of NatD byimmunohistochemical staining (IHC) on two sets of human NSCLC tissue arrayscontaining 74 squamous carcinomas, 73 adenocarcinomas, and adjacent normal lungtissue controls (Supplementary Table 1).We found that NatD was significantly upregulated in both squamous carcinomas andadenocarcinomas compared with normal lung tissues (Fig. 1b, c).