protomer1
/ˈprəʊtəmə/Chemistry
noun
Each of a number of tautomeric molecules which differ from each other only in the position of a proton; a prototropic tautomer.
Origin
1920s; earliest use found in Thomas Lowry (1874–1936), physical chemist. From proto- + -mer.
protomer2
/ˈprəʊtəmə/Biochemistry
noun
Each of the protein subunits of which an oligomeric protein is built up.
Origin
1960s. From prot- + -o- + -mer.