Now entering our 27th year, PBL Assay Science works hand in hand with industry, academic, and government researchers to help solve difficult assay development and protein quantification problems. Known as a trusted source for high quality, high sensitivity ELISAs as well as interferon proteins and antibodies, PBL has expanded our assay services capabilities, including ultrasensitive cytokine detection services, and increased our human cell-expressed cytokine and growth factor offerings.