PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
6289876-1	1982	The titration curves of the C-2 histidine protons of RNase A and of derivative II--a covalent derivative obtained by reaction of the enzyme with the halogenated nucleotide 9-beta-D-ribofuranosyl-6-chloropurine 5"-phosphate--in the presence of a number of purine nucleosides, nucleoside monophosphates, and nucleoside diphosphates were studied by means of proton nuclear magnetic resonance at 270 MHz.	nucleoside monophosphates	275-300	complement C2	Bos taurus	28-31