PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
1281035-5	1992	Although their mechanism of action is unknown, one class of compounds, the methylxanthines, have been shown to reverse a fundamental CF abnormality in CF salivary cells and in non-epithelial cells overexpressing CFTR.	methylxanthine	75-90	CF transmembrane conductance regulator	Homo sapiens	212-216