Protocole pour le refolding d'une protéine a partir d'un corps d'inclusion.
ICI
De la biologie moléculaire à la biochimie, il y a tous les protocoles nécessaire pour faire de la science.
vendredi 15 octobre 2010
Methodes de purification des proteines menbranaires, corps d'inclusion, et complexes
Methodes de purification des proteines menbranaires, corps d'inclusion, et complexes
ici
ici
vendredi 6 mars 2009
Optimisation PCR
PCR Primer Design Guidelines
Length : 18 to 30 nucleotides
GC Content: 40% to 60%
Annealing: For annealing temperature, use 5°C to 10°C below melting temperature (Tm).
Temperature: Example Tm calculation :
Tm (°C) = 2( #A + #T ) + 4( #G + #C )
Generally, a Tm between 55°C and 80°C will yield the best results.
Sequence: Avoid polybase sequences (3 or more) Gs and Cs at the 3' end.
Avoid mismatches at the 3' end. +
Avoid complementary sequences within the primer. +
Avoid primer-dimer formation by complementarity at 3' ends of primer pairs.
PCR Reaction Condition Guidelines
Primer concentration : - Final primer concentration should be 100 - 500 nM, which is equivalent to -100 to 250 ng of an 18- to 25-mer oligonucleotide primer in a 100-ul reaction volume. +
- Primers should be salt-free and gel-purified.
Length : 18 to 30 nucleotides
GC Content: 40% to 60%
Annealing: For annealing temperature, use 5°C to 10°C below melting temperature (Tm).
Temperature: Example Tm calculation :
Tm (°C) = 2( #A + #T ) + 4( #G + #C )
Generally, a Tm between 55°C and 80°C will yield the best results.
Sequence: Avoid polybase sequences (3 or more) Gs and Cs at the 3' end.
Avoid mismatches at the 3' end. +
Avoid complementary sequences within the primer. +
Avoid primer-dimer formation by complementarity at 3' ends of primer pairs.
PCR Reaction Condition Guidelines
Primer concentration : - Final primer concentration should be 100 - 500 nM, which is equivalent to -100 to 250 ng of an 18- to 25-mer oligonucleotide primer in a 100-ul reaction volume. +
- Primers should be salt-free and gel-purified.
Pourcentage gel d'acrylamide en fonction de la taille
| Recommended Aery | amide Gel |
| Percentages for Resolution of Protein | |
| Gel percentage | DNA size range |
| 8% | 40-200 kD |
| 10% | 21-100 kD |
| 12% | 10-40 kD |
Pourcentage gel d'agarose en fonction de la taille
-->
Recommended Agarose Gel Percentages
| |
for Resolution of Li
|
near DNA
|
Gel percentage
|
DNA size range
|
0.5%
|
1,000-30,000 bp
|
0.7%
|
800-12,000 bp
|
1.0%
|
500-10,000 bp
|
1.2%
|
400-7,000 bp
|
1.5%
|
200-3,000 bp
|
2.0%
|
50-2,000 bp
|
jeudi 26 février 2009
mardi 10 février 2009
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