PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
33513731-3	2021	Sulfuric acid, citric acid, and acetic acid were used to maintain the pH level, which varied from 5 to 2 for the precipitation process.	sulfuric acid	0-13	phenylalanine hydroxylase	Homo sapiens	70-72	
34170127-6	2021	To evaluate the role of pH during SET, we directly determined absolute rate constants for perfluorobutanoic acid and trifluoroacetic acid oxidation by SO4 - in the pH range of 0.5-4.0 using laser flash photolysis.	sulfuric acid	151-154	phenylalanine hydroxylase	Homo sapiens	164-166