| >> Oligo Calculation |
|
|
How Proligo calculates the Tm of your oligos
For oligonucleotides <= 20 bases, we use the classical
Tm = 2(A + T) + 4(G + C)
calculation for melting temperature, according to Wallace rule for short
oligonuceotides (1).
For oligonucleotide > 20 bases, calculation is based on the
Nearest-Neighbor formula with [salt] = 50 mM and single strand
concentration = 250 pM (2).
References
(1) Wallace, R.B.; Shaffer, J.; Murphy R.F.; Bonner, J.; Hirose, T.;
Itakura, K.; (1979)
Nucelic Acid Res. 6, 3543
(2) Breslauer, K.J.; Frank, R.; Blöcker, H.; Marky, L.A.;
(1986) Proc.Natl.Acad.Sci.USA 83, 3746-3750
|
|