PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
26382-2	1978	We have previously prepared Ntau-carbosymethylhistidine-200 human carbonic anhydrase B using 90% [1-13C]bromoacetate and have observed the 13C NMR resonance of the enriched carboxylate now covalently attached in the active site.	13c	100-103	carbonic anhydrase 2	Homo sapiens	66-86