Similar to endogenously expressed SIRT4, C-terminal eGFP fusion proteins of SIRT4 and SIRT4(ΔN28), the latter representing an N-terminally (a.a. 1–28) truncated SIRT4 mutant unable to translocate into mitochondria [42,49], were also detected at interphase centrosomes of HT1080 fibrosarcoma and HeLa cervix carcinoma cells (Figure S4 and Video S1). The gene discussed is SIRT4; the disease is fibrosarcoma.