Human gamma globulin and Plasma protein

Human gamma globulin noun - A plasma protein containing the immunoglobulins that are responsible for immune responses.

Plasma protein and human gamma globulin are semantically related. In some cases you can use "Plasma protein" instead a noun phrase "Human gamma globulin".

Plasma protein noun - Any of the proteins in blood plasma.

Human gamma globulin and plasma protein are semantically related. Sometimes you can replace phrase "Human gamma globulin" with "Plasma protein", this phrases are similar.