PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 30261344-7 2019 The activity of HAL-bound ALP was also found to be pH-independent in the wide range of pH values (3-10) due to the amphoteric nature of the aluminum oxide lining the HAL nanotube internal surface. Aluminum Oxide 140-154 alkaline phosphatase, placental Homo sapiens 26-29