CXCL13 and neoplasm: IL7R and KLF2 contribute to maintaining T cell quiescence,[23, 24] while ENTPD1, ITGAE, and PDCD1 are markers of tumor‐reactive T cells.[18, 25, 26] Gene trajectory analysis indicated that CXCL13 expression was initially low but significantly increased during cell development, whereas IL7R and KLF2 showed opposite expression patterns (Figure 5H).