A unique combination of PCR products and a number of proprietary plasmids digested with appropriate restriction enzymes to yield17 fragments, suitable for gel electrophoresis. The DNAincludes fragments ranging from 50-1,500 base pairs.The 200 and 500 base pair bands have increased intensity to serve as reference points. The approximate mass of DNA in each band is provided (0.5 g a load) for approximating the mass of DNA in comparably intense samples of a similar size. The ladder is ready-to-use, and is premixed with loading buffer dye for direct loading on gel.Loading dye contains orange G as the tracking dye.Range: 50bp - 1500bpNumber of bands: 17Recommended Load: 5 μl/well (0.5 μg)Stable for shipping at ambient temperaturesStorage/Handling:Store at 25°C for 6 months. Store at -20°C for 24 months.

Guide to Choosing Your DNA Ladder

★活体技术荧光检测荧光蛋白标记适用于标记细胞、病毒、基因等，通常使用的是 GFP、EGFP、RFP（DsRed）等；荧光染料标记适用于标记抗体、多肽、小分子药物等；常用的有 Cy3、Cy5、Cy5.5 及 Cy7量子点标记（新的标记方法）适用于标记肿瘤，主要应用在活细胞实时动态荧光观察与成像；量子点（quantum dot) 是一种能发射荧光的半导体纳米微晶体，外观恰似一极小的点状物。量子点荧光比有机荧光染料的发射光强的 20 倍，稳定性强 100 倍以上，具有荧光发光光谱较窄、量子产率高、不易漂白、激发光谱宽、颜色可调，并且光化学稳定性高，不易分解等诸多优点。