Human gamma globulin and Ig

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

Ig and human gamma globulin are semantically related. In some cases you can replace term "Ig" with "Human gamma globulin", this terms are similar.

Ig noun - A class of proteins produced in lymph tissue in vertebrates and that function as antibodies in the immune response.

Human gamma globulin and Ig are semantically related. You can use "Human gamma globulin" instead a noun "Ig".