Supplementary Table 1.
List of antibodies used for Western blotting experiments
| Target protein | manufacturer | Catalog No | Ab dilution |
| cleaved PARP | Cell Signaling | # 9532 | 1:1000 |
| cleaved Caspase 3 | Cell Signaling | # 9665 | 1:1000 |
| BCL-xL | Abcam | sc-634 | 1:1000 |
| MCL1 | BD Bioscience | BD-559027 | 1:1000 |
| Bax | BD Bioscience | BD-556467 | 1:1000 |
| Bak | R&D Systems | AF 816 | 1:1000 |
| ACDase α | BD Bioscience | BD-612302 | 1:1000 |
| ACDase β | Santa Cruz | sc-28486 | 1:500 |
| SPHK1 | Cell Signaling | # 3297 | 1:1000 |
| SPHK2 | Santa Cruz | sc-22704 | 1:500 |
| GCS | Santa Cruz | sc-50511 | 1:500 |
| SPL | Santa Cruz | sc-67368 | 1:500 |
| DEGS1 or DES1 | Bioss | bs-4057R | 1:1000 |
| CERS1 | Abnova | PAB18693 | 1:1000 |
| CERS2 | Santa Cruz | sc-100553 | 1:500 |
| CERS3 | Santa Cruz | sc-133725 | 1:500 |
| CERS6 | Abcam | ab56582 | 1:1000 |
| SIRT1 | Santa Cruz | sc-15404 | 1:500 |
| HDAC1 | Santa Cruz | sc-6298 | 1:500 |
| HDAC3 | Santa Cruz | sc-8138 | 1:500 |
| β-actin | Proteintech | 60008-I-Ig | 1:1000 |