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).

Bisindolylmaleimide III hydrochloride 是一种强效、高度选择性的蛋白激酶 C (PKC) 抑制剂。它通过竞争性结合 PKC 催化结构域中的 ATP 口袋，彻底阻断底物磷酸化级联反应，广泛用于探究免疫细胞活化及肿瘤克隆增殖机制。

Z-Arg-SBzl 是牛和人激活蛋白C 的底物。

15:0 PG sodium 是线粒体和微粒体膜中的阴离子磷脂，作为蛋白激酶 C 家族的激活剂，对肺表面活性剂组成尤其是肺部层状体膜内起着关键角色。

Myelin basic protein, MBP (68-86) 是 MBP 蛋白质序列中第 68 到第 86 位的氨基酸残基片段。作为自身抗原，它能够引发免疫系统对自身髓鞘的攻击。Myelin basic protein, MBP (68-86) 被用作实验性自身免疫性脑脊髓炎 (EAE) 动物模型中的一种免疫原，可用于多发性硬化症 (MS) 相关免疫反应的研究。