PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 29696970-3 2018 It was shown that the chiral center at C-4 plays a crucial role in controlling desymmetrization of the cyclopropenyl moiety, instigated by a profound potassium-templated effect. Potassium 150-159 complement C4A (Rodgers blood group) Homo sapiens 39-42