Glossary: I
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I
- IA:
- transient outward K+ current
- IAA:
- stands for indole-3-acetic acid; a plant hormone of the auxin family
- IAP:
- (1) stands for inhibitor of apoptosis protein; proteins that inhibit caspase activity; (2) stands for integrin-associated protein, also known as CD47, a cell surface protein that interacts with multiple partners; Connections Map Components -- Livin | Ts-IAP | Neuronal apoptosis inhibitory protein | CD47 | Cellular inhibitor of apoptosis protein 1/2 | X-linked inhibitor of apoptosis protein
- ICAD:
- stands for inhibitor of caspase-activated deoxyribonuclease; Connections Map Component -- Inhibitor of caspase-activated deoxyribonuclease
- ICAM:
- stands for intercellular adhesion molecule; a ligand for the integrin LFA1 on T cells
- ICliP:
- stands for intramembranous cleaving protease; also known as multipass membrane protease (MpMP)
- IEC:
- stands for intestinal epithelial cell
- IFN:
- stands for interferon; includes the type I and type II members of this family of cytokines; Connections Map Components -- Interferon-induced genes | Interferon alpha/beta | Interferon gamma
- IFN-alpha:
- stands for interferon-
(IFN-
); a type I interferon; Connections Map Component -- Interferon alpha/beta
- IFN-beta:
- stands for interferon-β (IFN-β); a type I interferon; Connections Map Component -- Interferon alpha/beta
- IFN-gamma:
- stands for interferon-γ; a proinflammatory type II interferon cytokine; Connections Map Component -- Interferon gamma
- Ig-alpha:
- stands for immunoglobulin-

- IGCs:
- stands for interchromatin granular structures; intranuclear storage compartment for splicing factors
- IGF:
- stands for insulin-like growth factor; Connections Map Component -- insulin-like growth factor 1
- IGFBP1:
- stands for insulin-like growth factor-1 binding protein
- iHog:
- stands for interference Hog; a member of the Cdon (cell adhesion molecule-related/down-regulated by oncogenes) family of proteins that bind Hedgehog; Connections Map Component -- Interference Hog
- IkappaB:
- stands for inhibitor of nuclear factor κB (NF-κB) (IκB); Connections Map Component -- Inhibitor of NF-kappa B alpha
- IKK:
- stands for inhibitor of nuclear factor κB (NF-κB) kinase; a multiprotein complex involved in activation of NF-κB; Connections Map Components -- IkappaB kinase epsilon | IkappaB kinase alpha | IkappaB kinase beta | IkB kinase complex
- IKKepsilon:
- stands for inhibitor of κB kinase ε, also known as IKK-i; a member of the IKK family of protein kinases that is involved in activation of interferon I responses; Connections Map Component -- IkappaB kinase epsilon
- IL:
- stands for interleukin; a family of cytokines; Connections Map Components -- Interleukin-4 | Interleukin-13 | Interleukin-6 type cytokines | Interleukin-1alpha | Chemokines
- IL-1R/TLR:
- stands for interleukin-1 receptor/Toll-like receptor; a family of receptors defined by the presence of the Toll-I/L-1R (TIR) domain that are involved in immune signaling
- IL-1RAcP:
- stands for interleukin-1 (IL-1) receptor accessory protein; a subunit of the IL-1 receptor
- IL-1RAPL:
- stands for interleukin-1 (IL-1) receptor accessory protein-like
- IL-RA:
- stands for interleukin-1 (IL-1) receptor antagonist
- ING2:
- stands for inhibitor of growth 2; a tumor suppressor that serves as a regulator of p53, chromatin remodeling, and gene expression
- iNOS:
- stands for inducible nitric oxide synthase; an enzyme responsible for the production of the gaseous signaling molecule nitric oxide (NO)
- IP:
- stands for (1) intramembranous proteolysis; a process whereby membrane proteins are cleaved within the transmembrane domain; (2) inositol phosphate
- IP3:
- stands for inositol 1,4,5-trisphosphate (IP3); a second messenger; Connections Map Component -- Inositol 1,4,5-trisphosphate
- IPS-1:
- stands for interferon- promoter stimulator 1; an adaptor involved in responses to viral infection, also known as MAVS, VISA, and CARDIF
- IRAK:
- stands for interleukin-1 receptor (IL-1R)-associated kinase; a serine-threonine kinase; Connections Map Components -- Interleukin-1 receptor-associated kinase-1 | Interleukin-1 receptor-associated kinase-M | Interleuken-1 receptor-associated kinase-4
- IRE:
- stands for iron responsive element; sequences in the untranslated regions of iron responsive messenger RNAs that allow regulation in response to iron deficiency by iron regulatory proteins (IRPs)
- IRF:
- stands for interferon regulatory factor; transcription factors involved in stimulation of interferon expression; Connections Map Components -- Interferon regulatory factor 3 | Interferon regulatory factor 9
- IRK:
- stands for inward rectifier potassium channel
- IRP:
- stands for iron regulatory protein; members of the aconitase family that regulate translation of iron responsive proteins
- IRS:
- stands for insulin receptor substrate; a family of proteins phosphorylated by the insulin receptor; Connections Map Components -- Insulin receptor substrate 2 | Insulin receptor substrates
- ISGF3:
- stands for interferon-
-stimulated gene factor 3; a multisubunit transcription factor; Connections Map Component -- IFN alpha-stimulated gene factor 3
- ISP-1:
- stands for interferon-β promoter stimulator 1; an adaptor protein involved in immune response to viral infection
- ISRE:
- stands for interferon-stimulated response element; a sequence in the promoter of target genes stimulated in response to interferons; Connections Map Component -- Interferon stimulated genes
- ITAM:
- stands for immunoreceptor tyrosine-based activation motif; phosphorylated tyrosines in this motif recruit positive signaling effectors; Connections Map Components -- Activating receptors associated to ITAM-polypeptides | ITAM-bearing polypeptide
- ITIM:
- stands for immunoreceptor tyrosine-based inhibition motifs; phosphorylated tyrosines in this motify recruit factors that inhibit signaling
- ITK:
- stands for interleukin-2 tyrosine kinase; nonreceptor tyrosine kinase; IL-2-inducible T cell kinase; Connections Map Component -- Interleukin-2 tyrosine kinase
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