Human blood is typed according to whether certain markers, called antigens, are present on the surface of red blood cells.

The surfaces of viruses, fungi, and bacteria contain chemicals called antigens.

Human blood is typed by certain markers (called antigens) on the surface of red blood cells.

They are there to recognize substances that are foreign to the body, called antigens.

Allergens, also called antigens, are substances that can trigger an allergic reaction.

It tifies chemical structures present on the surface of these cells called antigens.

These substances, which are called antigens, can invade your body and make you sick.

This function is accomplished by the immune system's ability to identify portions of proteins, called antigens.

An antibody is a protein that can attach to specific proteins in the body, called antigens.

Normally the immune system's white blood cells help protect the body from harmful substances, called antigens.