Biotin-PEG8-DBCO is a PEG linker containing a DBCO moiety and a biotin group. The DBCO groups is commonly used for Click Chemistry reactions. The hydrophilic PEG chain allows for increased water solubility of compounds in aqueous media. The terminal biotinylation can react with amine molecules in the presence of activator EDC or HATU. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
Detail
Biotin-PEG8-DBCO is a PEG linker containing a DBCO moiety and a biotin group. The DBCO groups is commonly used for Click Chemistry reactions. The hydrophilic PEG chain allows for increased water solubility of compounds in aqueous media. The terminal biotinylation can react with amine molecules in the presence of activator EDC or HATU. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
Other Products
HCM114 Bile Esculin Azide Agar
Product Info
Document
Product Info
Introduction
Intended Use
For the selective separation and enumeration of enterococci in food and water.
Principle and Interpretation
Tryptone and peptone are the sources of nitrogen and essential growth factors. Yeast extract acts as well nitrogenous compounds and additionally the vitamin B12 complex. Sodium azide acts largely inhibits the growth of gram-negative bacteria while sparing enterococci, staphylococci and streptococci. Ox bile inhibits most gram positives but not enterococci. Enterococci hydrolyse esculin to esculetin and dextrose, which reacts with ferric citrate producing a brownish black precipitate around the colonies. Tolerance to bile and the ability to hydrolyze esculin is the traditional and reliable test for the identification of enterococci. (4). Sodium chloride maintains the osmotic balance of the medium and Agar is the solidifying agent.
Formulation
Ingredients
/liter
Tryptone
17.0g
Ox bile
10.0g
Yeast extract
5.0g
Sodium chloride
5.0g
Peptone
3.0g
aesculin
1.0g
Ferric ammonium citrate
0.5g
Sodium azide
0.15g
Agar
15.0g
pH 7.1±0.1 at 25°C
Preparation
Weigh 56.6g of dry powder of this product, add 1 L of distilled water or deionized water, stir, heat and boil until completely dissolved, and sterilize at 121℃ for 15 min.
Quality Control
Cultural characteristics observed after incubation at 35-37°C for 20-24hours.
Quality control strains
Growth
Colony color
Enterococcus faecalis ATCC29212
PR≥0.7
Brown-black halo
Escherichia coli ATCC25922
inhibited
Absence of brown-black halo
Sorage and Shelf Life
Keep container tightly closed, store in a cool, dry place, away from bright light. Storage period of 3 years.
Precautions
1. When weighing the dehydrated medium, please wear masks to avoid causing respiratory system discomfort
2. Keep container tightly closed after using to prevent clumping.
Waste Disposal
Microbiological contamination was disposed by autoclaving at 121°C for 30 minutes.
Document
Intended Use For the selective separation and enumeration of enterococci in food and water. Principle and Interpretation Tryptone and peptone are the sources of nitrogen and essential grow……
Propargyl-PEG3-amine is a PEG linker that is reactive with carboxylic acids, activated NHS esters, carbonyls (ketone, aldehyde) etc. The propargyl group reacts with azides in copper catalyzed azide-alkyne Click Chemistry. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
Document
Propargyl-PEG3-amine is a PEG linker that is reactive with carboxylic acids, activated NHS esters, carbonyls (ketone, aldehyde) etc. The propargyl group reacts with azides in copper catalyzed azide-alkyne Click Chemistry. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
Fifteen discrete fragments ranging from 300 bp to 24000 bp
Higher intensity reference bands at 5000 bp and 10000 bp
The Norgen UltraRanger 1 kb DNA Ladder is prepared to ensure quality and batch-to-batch consistency. Our UltraRanger contains fifteen discrete fragments ranging from 300 bp to 24000 bp with higher intensity reference bands at 5000 bp and 10000 bp. This ladder is ideal for sizing digested DNA of high molecular weight.
Contents 1mL of premixed DNA ladder (0.5µg/10µL) in loading buffer (10mM EDTA, 10% glycerol, 0.015% bromophenol blue, and 0.17% SDS).
UltraRanger 1kb DNA Ladder (Cat# 12100) – 100 loads
Ladder Properties: • Fifteen discrete fragments ranging from 300 bp to 24000 bp
• Higher intensity reference bands at 5000 bp and 10000 bp
Fragment
Size (bp)
Mass (ng)
1
24000
30
2
14000
27
3
10000
60
4
8000
44
5
6000
36
6
5000
55
7
4000
49
8
3000
39
9
2500
35
10
2000
30
11
1500
33
12
1000
10
13
700
21
14
500
18
15
300
11
Recommended Use: Mix thoroughly. For best results, load 10µL of DNA ladder per well. For precise mass determination with a densitometer, stain gel after electrophoresis using 0.5µg/mL ethidium bromide for 30-40 minutes. The table above shows the size and mass for each band based on 10µL ladder per well.
Storage: Stable at room temperature. For longer term storage, -20°C is recommended.
This ladder was standardized using 10µL of DNA per lane on a 0.8 cm thick, 13 x 15 cm, 1.0% agarose gel run in TAE buffer.