Signal-transducer and activator of transcription protein at 92E (Stat92E) encodes a transcription factor that shuttles between the cytosol and nucleus and functions in the JAK/STAT pathway. Its roles include proliferation, growth control, organismal metabolism, cell competition, stem cell self-renewal, immunity and developmental patterning.

Unpaired 1 (upd1) encodes a secreted glycoprotein that is able to act at a distance as the primary ligand for the JAK/STAT signaling pathway. Although semi-redundant with upd2 and upd3, upd1 depletion results in embryonic lethality with an atypical gap gene-like segmentation phenotype.

Lnk, isoform D; Lnk (Lnk) encodes a member of the SH2B family of adaptor proteins. It functions within the insulin signalling pathway as an intracellular adaptor for the insulin receptor. It stabilises the interaction between the activated insulin receptor and the insulin receptor substrate, which are encoded by InR and chico respectively.

Unpaired 3 (upd3) encodes a "cytokine" (secreted protein) of the Unpaired family that can bind and activate the JAK-STAT receptor encoded by dome. It is induced in hemocytes or in the intestine upon damage to regulate the repair response in these tissues through JAK-STAT activation.

Suppressor of cytokine signaling at 36E (Socs36E) encodes a negative regulator of the JAK/STAT and EGFR pathways. It is a transcriptional target of the product of Stat92E that mediates lysosomal degradation following pathway stimulation and inhibits basal pathway activity.

Unpaired 2 (upd2) encodes a secreted molecule that acts at a distance as a ligand for the JAK/STAT signal transduction pathway. upd2 mutants are viable due to redundancy with other Upd-family genes.

Insulin receptor substrate 1; Activates phosphatidylinositol 3-kinase when bound to the regulatory p85 subunit (By similarity). May mediate the control of various cellular processes by insulin-like peptides. When phosphorylated by the insulin receptor binds specifically to various cellular proteins containing SH2 domains. Involved in control of cell proliferation, cell size, and body and organ growth throughout development. Also has a role in a signaling pathway controlling the physiological response required to endure periods of low nutrient conditions. Insulin/insulin-like growth fac [...]

Tyrosine-protein phosphatase non-receptor type 61F; Non-receptor protein tyrosine phosphatase required for maintaining Dock in its non-phosphorylated state.

Tyrosine-protein kinase Src64B; Src oncogene at 64B (Src64B) encodes a Src family nonreceptor tyrosine kinase. It has many biological roles, including ring canal morphogenesis in oogenesis and the male germline, microfilament ring constriction during cellularization, and modulation of growth and apoptosis. Some of its roles overlap with those of the product of Src42A.