碘化丙啶(Propidium Iodide,PI)即2,7-二氨基-9-苯基10-二乙胺基丙基碘化菲啶,是一种核酸荧光染料,它不能透过完整的细胞膜,但能够透过死细胞和凋亡中晚期细胞的细胞膜而使细胞核红染。因此,作为荧光探针常用于细胞凋亡(apoptosis)或细胞坏死(necrosis)的检测。在流式细胞和激光共聚焦分析中,常用于凋亡早晚期的细胞以及死细胞的区分以及在免疫染色时用于死细胞的非特异性染色的减除。由于PI可以定量插入DNA中,因此,还可用于细胞周期的分析与测定研究。 Sigma相关产品资料:Sigma P4170 Propidium iodide≥95% (HPLC)Synonym: 3,8-Diamino-5-[3-(diethylmethylammonio)propyl]-6-phenylphenanthridinium diiodideCAS Number: 25535-16-4Linear Formula: C27H34I2N4Molecular Weight: 668.39Beilstein Registry Number: 3843838EC Number: 247-081-0MDL number: MFCD00011921PubChem Substance ID: 24898510 DescriptionApplication Fluorescent stain for nucleic acids. Cell membrane integrity excludes propidium iodide from staining viable and apoptotic cells. Propidium iodide may be used in flow cytometry to evaluate cell viability when used with other dyes that stain viable cells or cells that are early in the apoptosis process.性质assay ≥95% (HPLC)mp 220-225 °C (dec.)(lit.)