PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 34735575-4 2022 Despite maintaining an overall similar structural conformation, our mass spectrometry-based site-specific glycosylation analyses of similarly produced spike proteins with and without the D614G and Alpha variant mutations reveal a significant shift in the processing state of N-glycans on one specific NTD site. n-glycans 275-284 surface glycoprotein Severe acute respiratory syndrome coronavirus 2 151-156