non-toxic

Argireline (Acetyl hexapeptide-3) 是可渗透皮肤的、无毒的抗皱肽。它对神经肌肉接头处依赖 Ca2+的神经递质释放具有显著的抑制作用。它具有抗皱和抗衰老的活性。

cyclo(L-Pro-L-Tyr) 是真菌和细菌的次生代谢产物。

N(delta)-acetylornithine是一种非蛋白氨基酸和防御相关的植物代谢物，主要发现于拟南芥(Arabidopsis)中，在饲料中添加可以可降低Myzus persicae的繁殖，具有一定的毒性。

Temporin A, a short alpha-helical antimicrobial peptide derived from the skin of Rana temporaria, exhibits a wide-ranging efficacy against Gram-positive bacteria. It directly interacts with the cell membrane of microorganisms and remains non-toxic to erythrocytes at antimicrobial concentrations. Additionally, Temporin A demonstrates antifungal properties against yeast-like Candida albicans.

The leguminous shrub,Leucaena leucocephala(Leucaena) is wide‐spread in tropical and subtropical agricultural systems and provides a ready source of protein for livestock. However, the presence of mimosine, a non‐protein, amino acid comprising about 12% of the dry matter in growing tips ofLeucaena, is toxic to animals. Mimosine is degraded rapidly in the rumen to produce 3,4‐dihydroxypyridine (3,4‐DHP) and 2,3‐dihydroxypyridine (2,3‐DHP), both of which remain toxic to animals[1]. 3,4-DHP, as a derivative of the plant amino acid mimosine, is goitrogenic in cattle, sheep, and mice. In contrast to established antithyroid compounds, such as methimazole (MMI) and propylthiouracil (PTU), 3,4-DHP has no SH-group. 3,4-DHP with various concentrations inhibited incorporation of125I into protein in human thyroid slices. It also suppressed the activation of lymphocytes by PHA (phytohaemagglutinin) and PWM (pokeweed mitogen). Suppression with 3,4-DHP was seen at 100 and 1000 μmol/L (P< 0.001 vs both PHA and PWM). Those, together with a very low murine bone marrow toxicity, probably related to the absence of an SH-group, make 3,4-DHP a potential antithyroid drug[2].

Ac-Val-Gln-aIle-Val-aTyr-Lys-NH2 是一种血清稳定化合物，能够选择性地抑制 tau 蛋白的纤维化，并且对神经细胞无毒。

Amp1EP9为一抗菌肽，作为开发有效无毒抗菌活性分子的强大工具，具备针对多重耐药细菌感染进行研究的潜力。

Fluorescein-6-carbonyl-Asp(OMe)-Glu(OMe)-Val-DL-Asp(OMe)-fluoromethylketone 是一种细胞渗透性且无毒的抑制剂，它能与活化的caspase-3在凋亡细胞内不可逆结合。该抑制剂的荧光强度可通过流式细胞仪、微孔板读数器或荧光显微镜检测。

Candidalysin是一种最初从Candida albicans中分离出的细胞溶解性肽毒素，具有毒性和非毒性特性。它通过与宿主细胞的上皮生长因子受体 (EGFR) 相互作用，激活上皮细胞信号通路，激活基质金属蛋白酶 (MMP) 和钙离子内流，引发炎症反应和免疫细胞的募集。Candidalysin通过对宿主细胞膜的损伤表现出细胞毒性。

INF7TAT 是一种包含流感病毒 HA2 序列和 TAT 肽的两亲性肽。它可以通过非共价键与其他大分子结合，并能用于无毒递送 siRNA。