PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 25288789-5 2014 We provide evidence that SMPDL3A is not an acid sphingomyelinase but unexpectedly is active against nucleotide diphosphate and triphosphate substrates at acidic and neutral pH. triphosphoric acid 127-139 sphingomyelin phosphodiesterase acid like 3A Homo sapiens 25-32