68 NCCN Guidelines for Patients ® : Multiple Myeloma, 2019 Words to know UIFE urine immunofixation electrophoresis UPEP urine protein electrophoresis U.S. Food and Drug Administration (FDA) A federal government agency that regulates drugs and food. urine immunofixation electrophoresis (UIFE) A test that identifies the type of M-proteins in the urine. urine protein electrophoresis (UPEP) A test that shows the amount of M-proteins in the urine. vaccine A biological agent inserted into the body to prevent a disease. vein A small tube that carries blood to the heart from anywhere in the body. vertebrae The chain of 33 bones in the back that protect a vital group of nerves. vertebroplasty A procedure to strengthen bones in the spine with bone cement. white blood cell A type of blood cell that fights infection.