Definitions
A dimer is an oligomer consisting of two subunits which may or may not be identical.
Trimer is an oligomer consisting of three subunits which may or may not be identical.
A tetramer is an oligomer consisting of four subunits which may or may not be identical.
A subunit is one of the peptide Chains of a complex protein.
A Homotrimer is an oligomer consisting of three identical subunits.
A heterotetramer is an early, consisting of four different subunits.
A protein domain is a protein in its native three dimensional structure.
Protein family is a family of proteins in which all the proteins are either structurally and functionally related.
A ligand is a molecule which binds to its receptor due to the complementary shape of ligand and receptor to initiate a cascade of reactions.
An allosteric molecule is the molecule which can have more than one conformation or shapes.
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structure, 3. On the DIPEPTIDE, label the following: Two central carbons, N-term, C-term, two R groups...