The reform legislature passed the Stetson-Eshelman Act, which increased the state Railroad Commissionâs authority and power to fix passenger and freight rates; thus ending Southern Pacific Railroadâs (SP) crushing monopolistic practices.
From Wikipedia, the free encyclopedia. In immunology, an antigen is a molecule capable of inducing an immune response on the part of the host organism, though sometimes antigens can be part of the host itself. In other words, an antigen is any substance that causes an immune system to produce antibodies against it.
Antibodies are immune system-related proteins called immunoglobulins. Each antibody consists of four polypeptides two heavy chains and two light chains joined to form a Y shaped molecule. The amino acid sequence in the tips of the Y varies greatly among different antibodies.