Noun | 1. | globulin - a family of proteins found in blood and milk and muscle and in plant seed alpha globulin - a globulin in blood plasma or serum that is alkaline and has great electrophoretic mobility serum globulin - globulins occurring in blood serum and containing most of the antibodies of the blood simple protein - a protein that yields only amino acids when hydrolyzed gamma globulin, human gamma globulin - a plasma protein containing the immunoglobulins that are responsible for immune responses myosin - the commonest protein in muscle; a globulin that combines with actin to form actomyosin |