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Primer3Plus
pick primers from a DNA sequence
Primer3Manager
Help
About
Source Code
Task:
Detection
Cloning
Sequencing
Primer_List
Primer_Check
Select primer pairs to detect the given template sequence. Optionally targets and included/excluded regions can be specified.
Mark an included region to pick primers fixed at its the boundaries. The quality of the primers might be low.
Pick a series of primers on both strands for sequencing. Optionally the regions of interest can be marked using targets.
Returns a list of all possible primers the can be designed on the template sequence. Optionally targets and included/exlcuded regions can be specified.
Evaluate a primer of known sequence with the given settings.
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Main
General Settings
Advanced Settings
Internal Oligo
Penalty Weights
Sequence Quality
Sequence Id:
Primer to test:
Paste source sequence below
Or upload sequence file:
Mark selected region:
Excluded Regions:
<
>
Targets:
[
]
Included Region:
{
}
Pick left primer
or use left primer below.
Pick hybridization probe
(internal oligo) or use oligo below.
Pick right primer or use right primer
below (5'->3' on opposite strand).
First Base Index:
Sequence Quality:
Start Codon Position:
Min Sequence Quality:
Min End Sequence Quality:
Sequence Quality Range Min:
Sequence Quality Range Max:
Product Size Ranges
Primer Size
Min:
Opt:
Max:
Primer Tm
Min:
Opt:
Max:
Max Tm Difference:
Primer GC%
Min:
Opt:
Max:
Fix the
prime end of the primer
Concentration of monovalent cations:
Annealing Oligo Concentration:
Concentration of divalent cations:
Concentration of dNTPs:
Mispriming/Repeat Library:
NONE
HUMAN
RODENT_AND_SIMPLE
RODENT
DROSOPHILA
Load and Save
Please select special settings here:
Default
qPCR
Probe
Use_Product_Size
(use Activate Settings button to load the selected settings)
To upload or save a settings file from your local computer, choose here:
Max Poly-X:
Table of thermodynamic parameters:
Breslauer et al. 1986
SantaLucia 1998
Max #N's:
Salt correction formula:
Schildkraut and Lifson 1965
SantaLucia 1998
Owczarzy et. 2004
Number To Return:
CG Clamp:
Max Self Complementarity:
Max 3' Self Complementarity:
Max 3' Stability:
Max Repeat Mispriming:
Pair Max Repeat Mispriming:
Max Template Mispriming:
Pair Max Template Mispriming:
Left Primer Acronym:
Internal Oligo Acronym:
Right Primer Acronym:
Primer Name Spacer:
Product Tm
Min:
Opt:
Max:
Use Product Size Input and ignore Product Size Range
Warning: slow and expensive!
Product Size
Min:
Opt:
Max:
Liberal Base
Do not treat ambiguity codes in libraries as consensus
Use Lowercase Masking
Sequencing
Lead
Bp:
Spacing
Bp:
Accuracy
Bp:
Interval
Bp:
Pick Reverse Primers
Hyb Oligo Excluded Region:
Hyb Oligo Size:
Min:
Opt:
Max:
Hyb Oligo Tm:
Min:
Opt:
Max:
Hyb Oligo GC%
Min:
Opt:
Max:
Hyb Oligo Monovalent Cations Concentration:
Hyb Oligo DNA Concentration:
Hyb Oligo Divalent Cations Concentration:
Hyb Oligo [dNTP] Concentration:
Max #Ns:
Hyb Oligo Max Poly-X:
Hyb Oligo Self Complementarity:
Hyb Oligo Max 3' Self Complementarity:
Hyb Oligo Max Mishyb:
Hyb Oligo Min Sequence Quality:
Hyb Oligo Mishyb Library:
NONE
HUMAN
RODENT_AND_SIMPLE
RODENT
DROSOPHILA
For Primers
For Primer Pairs
For Hyb Oligos
Tm
Lt:
Gt:
Product Tm
Lt:
Gt:
Tm
Lt:
Gt:
Size
Lt:
Gt:
Product Size
Lt:
Gt:
Size
Lt:
Gt:
GC%
Lt:
Gt:
GC%
Lt:
Gt:
Mispriming
Pair Mispriming
Hyb Oligo Mishybing
Self Complementarity
Any Complementarity
Self Complementarity
3' Self Complementarity
3' Self Complementarity
Template Mispriming
Template Mispriming
#N's
Hyb Oligo #N's
Sequence Quality
Sequence Quality
End Sequence Quality
Position Penalty
Tm Difference
End Stability
Primer Penalty Weight
Inside Target Penalty:
Hyb Oligo Penalty Weight
Outside Target Penalty:
Set Inside Target Penalty to allow primers inside a target.