名称 丽春红染色液 (Ponceau S Staining Solution)
规格 100ml | 500ml
存储 室温保存，一年有效
产品简介
丽春红染色液可以用于PVDF膜、硝酸纤维素膜(NC膜；nitrocellulose membrane)和醋酸纤维素膜(cellulose acetate membrane)上的蛋白的检测。丽春红带负电荷，可以与带正电荷的氨基酸残基结合，同时丽春红也可以与蛋白的非极性区相结合，从而形成红色的条带。注：丽春红染色液不适用于尼龙膜上的蛋白的检测（详见附加说明）。
丽春红对蛋白的染色是可逆的，染色后可以用蒸馏水，PBS或其它适当溶液洗去。丽春红对蛋白的检测下限是250ng。
本染色液为即用型工作液，可以直接使用，不用稀释。
使用说明
将PVDF膜、硝酸纤维素膜或醋酸纤维素膜浸没在丽春红染色液中，摇动5-10分钟或更长时间；取出印迹膜，用蒸馏水，PBS或其它适当溶液漂洗2-3次，可出现清晰条带，记录结果；用蒸馏水，PBS或其它适当溶液漂洗2-3次，每次3-5分钟，去除丽春红，进行后续的WB检测。
补充：丽春红染色液也可以直接用来染PAGE胶，不过，在染色之前用甲醇-乙酸溶液浸泡一下PAGE胶，起到固定蛋白的作用。。
附加说明
1）丽春红染色液可用于PVDF膜，NC膜，醋酸纤维素膜的可逆染色，但不适用于尼龙膜的可逆染色，因为尼龙膜带正电荷能与带负电荷的丽春红结合，不易脱色。
2）为了您的安全和健康，请穿实验服并戴一次性手套操作。
Ponceau S, Acid Red 112, or C.I. 27195 (systematic name: 3-hydroxy-4-(2-sulfo-4-[4-sulfophenylazo]phenylazo)-2,7-naphthalenedisulfonic acid sodium salt) is a sodium salt of a diazo dye of a light red color, that may be used to prepare a stain for rapid reversible detection of protein bands on nitrocellulose or polyvinylidene fluoride (PVDF) membranes (Western blotting), as well as on cellulose acetate membranes. A Ponceau S stain is useful because it does not appear to have a deleterious effect on the sequencing of blotted polypeptides and is therefore one method of choice for locating polypeptides on Western blots for blot-sequencing. It is also easily reversed with water washes, facilitating subsequent immunological detection. The stain can be completely removed from the protein bands by continued washing. Common stain formulations include 0.1% (w/v) Ponceau S in 5% acetic acid or 2% (w/v) Ponceau S in 30% trichloroacetic acid and 30% sulfosalicylic acid.
