A total protein and albumin/globulin (A/G) ratio test measures the total amount of protein in

your blood. There are two major types of protein in the blood:

• Albumin, which helps keep blood from leaking out of blood vessels. It also helps move hormones, medicines, vitamins, and other important substances throughout the body. Albumin is made in the liver.
• Globulins, which help fight infection and move nutrients throughout the body. Some globulins are made by the liver. Others are made by the immune system.