2-heptyl-3-hydroxy-4(1H)-Quinolone (Pseudomonas Quinolone Signal) is a quorum-sensing signalling molecule produced by Pseudomonas aeruginosa in response to increased cell density. It increases the expression of the lasB gene in P. aeruginosa, the secretion of the metabolites pyocyanin and the lectin PA-IL, as well as increasing biofilm production in P. aeruginosa populations. It also reduces the iron content of the P. aeruginosa growth medium when used at a concentration of 40 μM and acts as an iron chelator in iron sulphate solutions.

Galanin-Like Peptide (porcine) 是一种 60 个氨基酸的神经肽，首先从猪下丘脑中分离出来。Galanin-Like Peptide (porcine) 对 GALR2 受体具有高亲和力 (IC50 为 0.24 nM)，对 GALR1 受体具有较低亲和力 (IC50 为 4.3 nM)。

3-吲哚乙酸 (IAA) 是生长素类中最常见的植物激素，它调节植物生长和发育的各个方面。