4x100ml Low Speed Angle Rotor 

DBCO-PEG4-Maleimide is PEG linker containing a maleimide group and a DBCO moiety. The hydrophilic PEG spacer arm improves solubility in aqueous buffers. Maleimide group specifically and efficiently reacts with thiols to form stable thioether bonds. The low mass weight will add minimal spacer to modified molecules and will enable simple and efficient incorporation of DBCO moiety onto cysteine-containing peptides or other thiol-containing biomolecules. DBCO is commonly used for copper-free Click Chemistry reactions. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.

Introduction

Usages:
For selective isolation of Gram-negative bacteria, especially for Shigella and Salmonella.

Principle:
Yeast extract powder provide nitrogen, vitamins, growth factors; sodium chloride to maintain osmotic equilibrium ferric ammonium citrate of iron salts to produce a black iron sulfide; agar as medium coagulant; phenol red as pH indicator.

Formulation（per liter）:
Xylose 3.50g
L-Lysine 5.00g
Lactose 7.50g
Sucrose 7.50 g
Sodium Chloride 5.00 g
Yeast Extract 3.00g
Sodium Desoxycholate 2.50g
Sodium Thiosulphate 6.80g
Fe-Ammonium Citrate 0.80g
Phenol Red 0.08g
Agar 13.50
Final PH 7.4±0.2    

How to use:
1.Suspend 55.2g in 1Lof distilled or deionized water. Heat with frequent agitation and boil to completely dissolve the powder. Do not autoclave ,cool to 50℃ and pour into sterile petri dishes.
2.Dilluted and treated samples.

Quality control:
Quality control strains were inoculated ,and cultured at 36 ± 1 ℃ for 24h ,results show as follows:
strain name              strain code            growth           feature
Arizona bacteria       CMCC (B) 47001          good            black colonies
Salmonella typhimurium CMCC (B) 50115          good            black colonies
Streptococcus faecalis    CMCC32223            prohibited         —        

Storage: Store in a dark, cool and dry place, tighten the cap immediately after use. Storage period of three years.

Specifications: 250g/bottle

250g

Propargyl-PEG6-NHS ester is an amine reactive linker. The alkyne in this linker can react with azide-bearing compounds or biomolecules via copper catalyzed Click Chemistry reaction. The PEG spacer increases solubility of the molecule in aqueous media. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.

Propargyl-PEG6-NHS ester is an amine reactive linker. The alkyne in this linker can react with azide-bearing compounds or biomolecules via copper catalyzed Click Chemistry reaction. The PEG spacer increases solubility of the molecule in aqueous media. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.