TY - RPRT TI - Does pH 6 beta-galactosidase activity indicate cell senescence? AU - D R Krishna AU - B Sperker AU - P Fritz AU - U Klotz PY - 1999 DO - 10.1016/s0047-6374(99)00031-7 UR - https://pubmed.ncbi.nlm.nih.gov/10515661/ ID - 10515661 ER -