PCK2 and cancer: Mendez‐Lucas et al. showed that restriction of nutrients (amino acids, including glutamine, arginine, lysine, methionine, and cysteine) or treatment with inducers of endoplasmic reticulum stress (thapsigargin and tunicamycin) upregulated the mRNA expression of PCK2 in various cancer cell lines—MCF‐7, HeLa, HCT116, and NIH‐3T3Kras.