Breast cancer cells lacking STARD7 do not have enough PC in mitochondria and may therefore try to synthetize PC from Phosphatidylethanolamine (PE) through a cascade of reactions relying on Phosphatidylethanolamine N‐Methyl Transferase (PEMT) and on SAM (Figure S9, Supporting Information). The gene discussed is PEMT; the disease is breast carcinoma.