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Elektrophorese-Technik

The gel Company
fluorotechnics

fluorotechnics companies

Staining

Normally the target molecules of the electrophoretic process must be visualized in a staining process after the separation.
Exceptions are coloured proteins, f.e. Hemoglobins or other dyes themselves used as tracking molecules.
Prestaining (before electrophoresis): DNA-molecules can be tagged, DIGE is a prestaing method before IEF in a 2D-procedure

Coomassie R350 & G250,
Serva-Violet, Stains All, Indoine Blue

LavaPurple, Sypro Ruby, DIGE, CY, Sybr Green

AgNO3

Dez 17, 2008

Method

Molecule

Dye (company #order number)

Sensitivity*

Info

Direct Staining

proteins

Coomassie R 350 Amersham #17-0518-01
Serva-Violet 17 SERVA #35072

10-100 ng
50-500 ng

SDS: still the best! Quantifiable
IEF: for lipophylic and Glyco-proteins

DNA

“Stains All” Sigma # E9379-1G
Indoine Blue Sigma #200816-SG (Aldrich)

10 ng
xx

Very easy handling, quantifiable!
In work.....

Fluorescence

dsDNA

dsDNA:GelStar Cambrex #50535
Sybr Green I Molecular Probes #S7563

0.5 ng
0.5 ng

Tagging or staining
Tagging or Staining

ssDNA/RNA

Sybr Green II Molecular Probes #S7564

2 ng

Denaturating run: No Tagging!

proteins

LavaPurple: fluorotechnics #LP-011005
LavaBlue: fluorotechnics #LB-xxxxxx
SYPRO Ruby: Molecular Probes #S12001

0.2 -1 ng
xx
2 ng

Linear quantification possible
In work...
Linear quantification possible

Silver-Staining

nucleic acids

AgNO3

100 pg

No quantification possible

proteins

AgNO3

300 pg

No quantification possible

* per band