This also included four proteins with on/off characteristics in the CP data, namely achaete‐scute homolog 1 (ASCL1; ‘on’ in SCLC‐A), regulator of G‐protein signalling 22 (RGS22; ‘on’ in SCLC‐P), neurexophilin‐4 and puratrophin‐1 (NXPH4 and PKHG4; ‘off’ in SCLC‐Y). Here, NXPH4 is linked to small cell lung carcinoma.