I1S1O1A1N1T1I1G2E1N1S1
12 points
ISOANTIGENS is validvalid
ISOANTIGEN, [n]
ISOANTIGEN, an antigen that stimulates antibody production in different members of the same species [n]
ISOANTIGEN, [n]
ISOANTIGEN, an antigen that stimulates antibody production in different members of the same species [n]