Epsilon-V1-2 (ε-V1-2), a PKCε-derived peptide, is a selective PKCε inhibitor. Epsilon-V1-2 inhibits the translocationof PKCε, but not α-, β-, and δPKC.

HBDDE, a derivative of Ellagic acid, is an isoform-selective PKCα and PKCγ inhibitor with IC50s of 43 μM and 50 μM, respectively. HBDDE shows selective for PKCα/PKCγ over PKCδ, PKCβI and PKCβII isozymes. HBDDE induces neuronal apoptosis.

LSKL, Inhibitor of Thrombospondin (TSP-1) is a latency-associated protein (LAP)-TGFβ derived tetrapeptide and a competitive TGF-β1 antagonist. LSKL, Inhibitor of Thrombospondin (TSP-1) inhibits the binding of TSP-1 to LAP and alleviates renal interstitial fibrosis and hepatic fibrosis. LSKL, Inhibitor of Thrombospondin (TSP-1) suppresses subarachnoid fibrosis via inhibition of TSP-1-mediated TGF-β1 activity, prevents the development of chronic hydrocephalus and improves long-term neurocognitive defects following subarachnoid hemorrhage (SAH). LSKL, Inhibitor of Thrombospondin (TSP-1) can readily crosse the blood-brain barrier.

Ruboxistaurin (LY333531) is an orally active, selective PKCβ inhibitor (Ki=2 nM). Ruboxistaurin exhibits ATP dependent competitive inhibition of PKCβI with an IC50 of 4.7 nM. Ruboxistaurin inhibits PKCβII with an IC50 of 5.9 nM.

1-Stearoyl-2-arachidonoyl-sn-glycerol is a diacylglycerol (DAG) containing polyunsaturated fatty acids. 1-Stearoyl-2-arachidonoyl-sn-glycerol can activate PKC. 1-Stearoyl-2-arachidonoyl-sn-glycerol also can augment nonselective cation channel (NSCC) activity.

Leucosceptoside A is a phenylethanoid glycoside with anti-hyperglycemic and anti-hypertensive activities. Leucosceptoside A shows inhibitory activity against α-glucosidase and PKCα (IC50 of 19.0 μM).

TGFβRI-IN-1 is an oral active and selective TGFβ receptor type I (TGFβRI) kinase inhibitor, with IC50 values of 2 nM and 7.6 μM for TGFβRI and TGFβRII, respectively .

TGFβRI-IN-3 inhibits TGFβR1 at an IC50 of 0.79 nM with 2000-fold selectivity against MAP4K4. TGFβRI-IN-3 represents a highly selective TGFβR1 inhibitor that has potential applications in immuno-oncology.

CC-90005 is a potent, selective and orally active inhibitor of protein kinase C-θ (PKC-θ), with an IC50 of 8 nM. CC-90005 shows selectivity for PKC-θ over PKC-δ (IC50=4440 nM). CC-90005 can inhibit T cell activation by IL-2 expression.

Mezerein is a PKC activator that exhibits antileukemic properties. Mezerein inhibits the growth of yeast expressing PKC alpha (IC50=1190 nM), PKC beta1 (IC50=908 nM), and PKC delta (IC50=141 nM) but not of yeast expressing PKC.

Bisindolylmaleimide XI hydrochloride (Ro 32-0432) is a potent, selective and orally active PKC inhibitor with IC50s of 9 nM, 28 nM, 31 nM, 37 nM, and 108 nM for PKCα, PKCβI, PKCβII, PKCγ, and PKCε, respectively.

PF-03622905 is a potent and ATP-competitive PKC inhibitor with IC50s of 5.6 nM, 14.5 nM, 13 nM, 37.7 nM, and 74.1 nM for PKCα, PKCβI, PKCβII, PKCγ, and PKCθ, respectively. PF-03622905 shows high specificity for PKC over other protein kinases.

Myelin Basic Protein (MHP4-14) TFA, a synthetic peptide comprising residues 4-14 of myelin basic protein, is a very selective PKC substrate (Km=7 μM). Myelin Basic Protein TFA is not phosphorylated by cyclic AMP-dependent protein kinase, casein kinases I and II, Ca2+/calmodulin-dependent protein kinase II, or phosphorylase kinase, and can be routinely used for the assay of protein kinase C with low background in the crude tissue extracts.

Sangivamycin (NSC 65346), a nucleoside analog, is a potent inhibitor of protein kinase C (PKC) with an Ki of 10 μM. Sangivamycin has potent antiproliferative activity against a variety of human cancers.

Bryostatin 3, a macrocyclic lactone, is a protein kinase C activator, with a Ki of 2.75 nM. Bryostatin 3 can block 12-O-tetradecanoylphorbol-13-acetate (TPA) inhibition of cell proliferation, yet did not block TPA-enhanced cell-substratum adhesion.

PF-04577806 is a potent, selective and ATP competitive PKC inhibitor. PF-04577806 shows potent inhibitory activity towards PKCα, PKCβI, PKCβII, PKCγ, and PKCθ with IC50s of 2.4 nM, 8.1 nM, 6.9 nM, 45.9 nM, and 29.5 nM, respectively. PF-04577806 can reverse retinal vascular leakage in diabetic rats.

(±)-1,2-Diolein (1,2-Dioleoyl-rac-glycerol) is a PKC activator.

1,2-Didecanoylglycerol, a synthetic diacylglycerol, is metabolized by platelets to 1,2-didecanoylphosphatidic acid (PA10) and activates protein kinase C (PKC).

1-Oleoyl-2-acetyl-sn glycerol is a synthetic, cell permeable diacylglycerol analog. 1-Oleoyl-2-acetyl-sn glycerol activates calcium-dependent protein kinase C (PKC) and induces the superoxide-production.

TGFβR-IN-1 is a long-acting tumor-activated prodrug of a TGFβR inhibitor.

TGFβ-IN-1 is an antitumor growth and metastasis agent through inhibiting the transforming growth factor‑β signaling pathway.

Teleocidin A1 (Lyngbyatoxin A), a highly toxic skin irritant, is a potent activator of protein kinase C (PKC). Teleocidin A1 shows antiproliferative activity against HeLa cancer cells (IC50=9.2 nM).