Cytokines are essential molecules that play crucial roles in many biological functions, including viral infection, inflammation, immunity, and hematopoiesis. Cytokines are produced by a variety of cell types in response to different stimuli. In addition, the expression of cytokine genes appears to be regulated by complex mechanism. Expression of one cytokine gene could be regulated by other cytokines. Dysregulation of cytokine gene expression may be caused by chromosomal alterations or by infection of viruses that induce activation or inactivation of the expression machinery. Therefore, profiling of these cytokines is critical to understanding these biological functions. Signosis' Human Cytokine ELISA Strip I Profiling Assay allows simultaneously profiling 8 human cytokines. Each well of the strip is coated with a primary antibody against a specific cytokine. 8 wells target 8 different cytokines in one strip. The difference of these proteins between two samples can be determined through data comparison.