Calphostin C is a protein kinase C inhibitor.

PF-04577806 is a potent, selective, and ATP competitive inhibitor of the protein kinase C (PKC). It exhibits significant inhibitory activity against various isoforms of PKC, including PKCα, PKCβI, PKCβII, PKCγ, and PKCθ, with IC50 values of 2.4 nM, 8.1 nM, 6.9 nM, 45.9 nM, and 29.5 nM, respectively. Furthermore, PF-04577806 has the ability to reverse retinal vascular leakage in diabetic rats.

(-)-Maackiain是一种天然的炎症调节剂，抑制组胺H1受体和IL-4基因的转录上调，抑制PKCδ的激活，激活caspase-1途径并促进IL-1β的产生。

CREBtide is a synthetic substrate for PKA (Km=3.9 µM), which is based on the phosphorylation sequence in d-CREB (cAMP response element binding protein).

K-252b is an indolocarbazole isolated from the actinomycete Nocardiopsis and is a PKC inhibitor. K-252b can be used to inhibit extracellular kinases of cells in culture because it can’t pass through the cell membrane freely.

Sphingosine (d14:1) is a bioactive sphingolipid that has been found in B. mori (silkworm), P. clarkii (crayfish), and A. aurita (jellyfish) extracts. It increases the germination rate of N. rileyi, an entomopathogenic fungus, with an EC50 value of 10.2 nM. Sphingosine (d14:1) inhibits protein kinase C (PKC) in vitro (IC50 = 7.3 mol%) as well as superoxide generation induced by phorbol 12-myristate 13-acetate in neutrophils and reduces growth of CHO cells (IC50s = 19 and 8 μM, respectively).