PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
488117-1	1979	Purified vitellogenin mRNA of Xenopus laevis was incubated with mechanically sheared DNA in high concentrations of formamide and the resulting R-loops (i.e. RNA .	formamide	115-124	a1-a	Xenopus laevis	9-21	
658040-1	1978	cDNA synthesized on purified vitellogenin mRNA from Xenopus liver was hybridized to the template in formamide/urea at 22 degrees C to avoid degradation of the RNA.	formamide	100-109	a1-a	Xenopus laevis	29-41