PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 34797354-3 2021 And such two-dimensional structures are similar to graphene or stanene, but half of the Sn atoms are replaced by group-IV atoms to form new structures, which are called Sn-X (X = C, Si, and Ge). Graphite 51-59 annexin A7 Homo sapiens 169-173