SYTO™ 40 蓝色荧光核酸染色剂 - 5 mM 的 DMSO 溶液

SYTO核酸染料的结合方式尚不清楚。但是，SYTO以及相关的核酸染料具有以下结合特性：

1.它们与一些溶剂结合（通过对盐、二价阳离子的敏感性，特别是SDS），因此，它们可能结合到DNA沟槽处。
2.所有SYTO染料都表现出一些碱基选择性，因此，它们可能结合到DNA小沟处。
3.通过乙醇沉淀可从核酸中去除SYTO染料；溴化乙锭和其他嵌入剂不具有此特性。同样，丁醇和氯仿提取不能从核酸中去除SYTO染料，但能够去除溴化乙锭。
4.SYTO 结合不受非离子去垢剂的影响。
5.SYTO染料不会被BrdU淬灭，因此，SYTO染料与核酸的结合方式不同于Hoechst 33342和DAPI（4',6-二脒基-2-苯基吲哚）。

SYBR Green I对移码指示菌几乎没有致突变性，证明其不大可能是强嵌入剂。

The binding mode of SYTO nucleic acid stains is unknown. However, the behavior of these and related nucleic acid dyes suggests the following binding properties:

1.They appear to contact the solvent (suggested by sensitivity to salt, divalent cations, and in particular, SDS) and thus are likely to have contacts in the grooves.
2.All SYTO dyes appear to show some base selectivity and are thus likely to have minor groove contacts.
3.They can be removed from nucleic acid via ethanol precipitation; this characteristic is not shared by ethidium bromide and other intercalators. Likewise, the dyes are not removed from nucleic acid via butanol or chloroform extraction. These extraction methods do remove ethidium bromide from nucleic acid. 4. SYTO binding is not affected by nonionic detergents.
5. SYTO dyes are not quenched by BrdU, so they do not bind nucleic acids in precisely the same way as Hoechst 33342 and DAPI ((4′,6-diamidino-2-phenylindole).

SYBR Green I has shown little mutagenicity on frameshift indicator strains, indicating that it isn't likely to strongly intercalate.

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