PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
2741339-4	1989	Examination of the ability of paired combinations of the P proteins to associate indicated that PB1 contained independent binding sites for PB2 and PA, and so probably formed the backbone of the complex.	Protactinium	148-150	polybromo 1 L homeolog	Xenopus laevis	96-99