PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 32167180-6 2020 Although overall variation in open-reading frame (ORF) regions is low, 13 variation sites in 1a, 1b, S, 3a, M, 8, and N regions were identified, among which positions nt28144 in ORF 8 and nt8782 in ORF 1a showed mutation rate of 30.53% (29/95) and 29.47% (28/95), respectively. nt28144 167-174 surface glycoprotein Severe acute respiratory syndrome coronavirus 2 101-102