精胺是含有两个氨基和两个亚氨基的多胺类物质，在生物体内由腐胺（丁二胺）和S-腺苷蛋氨酸经多种酶催化后生成。它与亚精胺都存在于细菌和大多数动物细胞中，是促进细胞增殖的重要物质。在酸性条件下，它呈现出多阳离子多胺类特性，并能与病毒与细菌中DNA结合。使DNA分子具有更大的稳定性与柔韧性，也是细胞培养液中必要组分之一。
R0, Vmax, and ECs were significantly correlated with the physiological activities(ATPase activity and the content of spermidine and spermine) of the grains in early grain filling period.
R0、Vmax、V和ECs与灌浆初期的籽粒生理活性（ATP酶活性、亚精胺和精胺含量）密切相关。
参考来源 - 稻穗颖花开花时间对胚乳发育的影响及其生理机制The effects of spermine on capaciation and acrosome reaction of cricket sperm have been determined under light microscope.
通过体外培养的方法，在光镜水平上测定了精胺对蟋蟀精子获能和顶体反应的影响。
参考来源 - 蟋蟀精子体外获能及顶体反应的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
精胺能诱导血影膜的融合。
目的动态观察脑梗死患者血清腐胺、精脒、精胺水平变化。
Objective To study the changes in levels of serum polyamines in the patients with cerebral infarction.
分别在缺氧前给予精胺，缺氧-复氧后给予精胺、精脒、腐胺。
Spermine was added extracellularly to the bath before anoxia and spermine, spermidine or putrescine was added extracellularly after reoxygenation.
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