MRLN and neoplasm: For example, a putative muscle‐specific lncRNA encodes a peptide named DWORF, which is localized to the sarcoplasmic reticulum (SR) membrane and enhances SERCA activity by displacing its inhibitors phospholamban, sarcolipin and myoregulin.[14] Herein, our results demonstrate that a small peptide located on mitochondria could increase the viability of tumor cells by enhancing incomplete cell mitophagy.