狠狠色综合7777久夜色撩人,久久人妻少妇嫩草av,国产免费AV片在线无码免费看,西西444WWW无码大胆,国产伦精品一区二区三区免费,成年人免费在线视频观看_免费人成动漫在线播放r18_永久免费人成在线直播_又长又大又粗又硬3p免费视频_成人动漫日本一区二区三区_久久精品这里只有精99品_最新在线精品国自av_欧美精品免费专区在线观看 ,一区二区三区免费视频|一区二区三区高清视频国产女人|手机国产乱子伦精品视频|日韩在线观看高清视频,日本中文字幕,国产真实乱子伦精品视手机观看，国产成人咱精品视频免费网站 ,中文字幕第一页720p电影-国产v片成人影院在线观看,中文字幕高清不卡免费,亚洲欧美日韩综合久久久久,午夜爽爽爽男女免费观看hd

Hampton Research是世界權威的蛋白結晶試劑與耗材的生產商，其產品應用廣泛且深受廣大用戶的認可。

PEG/Ion ? PEG/Ion 2 ? PEG/Ion HT

HR2-126 ，PEG/Ion Screen 10 ml, tube format

HR2-098， PEG/Ion 2 Screen 10 ml, tube format

HR2-139， PEG/Ion HT 1 ml, Deep Well block format

APPLICATIONS

Primary or secondary, polymer, salt and pH matrix crystallization screen for biological macromolecules

FEATURES

Developed at Hampton Research

PEG/Ion is a sparse matrix profile of anions and cations in the presence of monodisperse Polyethylene glycol 3,350 over pH 4.5 - 9.2

PEG/Ion 2 screens a complete profile of titrated organic acids at varying pH levels (3.7 - 8.8) in the presence of monodisperse PEG 3,350

PEG/Ion HT combines PEG/Ion and PEG/Ion 2 in a single 96 Deep Well block

DESCRIPTION

PEG/Ion, developed by Hampton Research, is a crystallization screen designed to evaluate monodisperse, high purity Polyethylene glycol 3,350 and 48 unique salts representing a very complete range of anions and cations frequently used in the crystallization of biological macromolecules.

The primary screening variables are PEG, ion type, ionic strength, and pH. More than 60% of the published crystallizations utilized PEG as a primary crystallization reagent and in approximately 50% of those reports, the PEG was combined with an ion as a secondary crystallization reagent. PEG/Ion reagents are formulated without a buffer and are not pH titrated.

PEG/Ion 2 is an extension to the fundamental crystallization strategy in PEG/Ion. PEG/Ion 2 reagents cover the monodisperse, high purity Polyethylene glycol 3,350 and an array of neutralized and pH adjusted organic acids, multivalent ions, a novel Citrate BIS-TRIS propane buffer system and pH (4 - 8.8). The formulation of PEG/Ion 2 was developed at Hampton Research. Each of the 48 reagents in PEG/Ion 2 contains PEG 3,350 as the polymer (precipitant). The concentration of PEG is varied from 12% w/v to 20% w/v depending upon the type and concentration of buffer/salt paired with the polymer. Thirteen of the forty-eight PEG/Ion 2 reagents contain a separate buffer component. The remaining PEG/Ion 2 reagents are buffered by the titrated organic acid salt. Six of these thirteen conditions feature a novel Citric acid BIS-TRIS propane (CBTP) buffer. The CBTP buffer uses Citric acid and BIS-TRIS propane as the acid base pair to create a two component buffer system effective across pH 2.5 to 9.5. The ratio of Citric acid to BIS-TRIS propane determines the solution pH. Thirty-five of the forty-eight PEG/Ion 2 reagents contain a neutralized or pH adjusted organic acid in the presence of the polymer. Neutralized organic acids are highly effective crystallization salts.1 Four PEG/Ion 2 reagents feature polyvalent cations. Two of these reagents contain cation mixes, saving sample by screening six different cations with only two reagents. Tryptone, a casein digest combinatorial library of peptides, is included in PEG/Ion 2. PEG/Ion 2 reagents 1-30, 42, 45-47 are formulated without a buffer and are not pH titrated.

希凱生物代理美國Hampton Research，負責其在中國的銷售與推廣，更多產品信息，歡迎與我們聯(lián)系