PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 26631697-6 2008 We find that nom-CPO level captures the bulk of the static correlation energy, and MRMP2/nom-CPO calculations have an average error of only 1.4 kcal/mol in barrier heights, which may be compared to 5.0 kcal/mol for single-reference MP2 theory, 2.5 kcal/mol for CCSD, and 4.1 and 1.0 kcal/mol for the B3LYP and M06-2X density functionals, respectively. ccsd 261-265 carboxypeptidase O Homo sapiens 93-96