IL-7 is a cytokine that acts as a growth factor for early lymphoid cells of both B- and T-cell lineages. IL-7 and IL-7Ralpha bind the gamma-c receptor forming a complex crucial to several signaling cascades leading to the development and homeostasis of T and B cells [1] [2].

1: The tertiary structure of gammac cytokines dictates receptor sharing. Reche PA; Cytokine. 2019;116:161-168. PMID:30716660

2: Structural and biophysical studies of the human IL-7/IL-7Ralpha complex. McElroy CA, Dohm JA, Walsh ST; Structure. 2009;17:54-65. PMID:19141282