SiR-actin has fluorescence, cell permeability, and high specificity for F-actin. Sir-atin staining for endogenous F-actin does not require gene manipulation or overexpression. Its emission in far-red light minimizes phototoxicity and the self fluorescence of the sample. SiR-actin is compatible with GFP and/or m-Cherry fluorescent proteins. It can be imaged using standard Cy5 filters. SiR-actin can be used for wide field of view, confocal, SIM or STED imaging of living cells and tissues. The number of probes allows for 50 to 200 staining experiments* (* Based on the following conditions: 0.5 1ml staining solution/0.5 1um probe concentration for staining experiments. The number of staining experiments can be further increased by reducing the volume or probe concentration).

SiR Action cell imaging

The imaging of SiR action is best done using standard Cy5 settings. After labeling, live cells can be immediately imaged without the need for washing steps. Optionally, a simple washing step includes replacing the labeled solution with fresh culture medium without probes, which typically improves the signal-to-noise ratio. If time elapses for imaging, it is recommended to keep the probe concentration equal to or lower than 100 nM throughout the experiment to obtain a constant signal and avoid probe interference with actin dynamics (reducing cell proliferation). If cleaning cells

Before imaging, the staining will last for several hours.

SiR-actin具有熒光性、細胞通透性和對F-actin的高度特異性。Sir-actin染色內源性的F-actin不需要基因操作或過表達。它在遠紅光中的發射最大限度地降低了光毒性和樣品的自身熒光。SiR-actin兼容GFP和/或m-cherry熒光蛋白質。它可以用標準的Cy5濾鏡進行成像。SiR-actin可用于活細胞和組織的寬視場、共聚焦、SIM或STED成像。探針數量允許50 - 200染色實驗。*（*基于以下條件:0.5 - 1ml染色液/ 0.5 - 1um探針濃度的染色實驗。染色實驗的數量可以通過減少體積或探針濃度來進一步增加）。

艾美捷 SiR-Actin試劑盒#CY-SC001物理特性：

abs 652 nm

Em 674 nm

ε652 nm 1.0·105 mol-1·cm-1

MW 1241.6 g/mol

MF C71H88N8O10Si

探針濃度（nM） 建議標記時間（h）*

> 1000      0.5 - 1

500           3 - 4

200           4 - 6

< 100        6 - 12

SiR-Actin試劑盒文獻參考：

1. Fluorogenic probes for live-cell imaging of the cytoskeleton, G. Lukinavi?ius et al., Nature Methods, 11, 731–733 (2014)