★ Founders price. 40% off the first two years of an annual plan started by June 30, 2027, then the standard price. See the plans →
← Primer database

Primer database

GAPDH

glyceraldehyde-3-phosphate dehydrogenase

Bos taurus

PublicationStradovnik-Poikilidis et al. 2026

Sequences

Forward (5′→3′)

GGCGTGAACCACGAGAAGTATAA

Reverse (5′→3′)

CCCTCCACGATGCCAAAGT

Amplicon

119 bp

as reported in the source

Primer Tm (°C)

ConditionsForwardReverseAverageΔ F/R
qPCR master mix63.664.163.80.4
Primer-BLAST default60.760.060.30.7

qPCR master mix: Owczarzy 2004/2008 · 250 nM primer · 50 mM Na⁺ · 3 mM Mg²⁺ · 0.8 mM dNTP

Primer-BLAST default: SantaLucia 1998 salt corr. · 50 nM primer · 50 mM Na⁺ · 1.5 mM Mg²⁺ · 0.6 mM dNTP

Bold, underlined base = 3′ end (polymerase extension point).

Primer QC

GC% · Forward

47.8%

GC% · Reverse

57.9%

Self-dimer ΔG · Fwd (any position)

-3.1 kcal/mol

Self-dimer ΔG · Fwd (3′ end)

No duplex found

Self-dimer ΔG · Rev (any position)

-0.3 kcal/mol

Self-dimer ΔG · Rev (3′ end)

0.5 kcal/mol

Heterodimer ΔG (F×R, any position)

-3.1 kcal/mol

Heterodimer ΔG (F×R, 3′ end)

0.5 kcal/mol

ΔG at 37 °C · SantaLucia 1998 NN parameters · < −6 kcal/mol = significant dimer risk · "3′ end" is restricted to duplexes anchored at a primer's own 3′ terminal base (polymerase-extendable); "any position" is the most stable duplex anywhere in the primer. Estimated screening value. For comprehensive dimer analysis, validate with Primer3.

Source

PMID

42633138(Europe PMC)

Citation

Stradovnik-Poikilidis et al. 2026

Genomic mapping

Ensembl gene

ENSBTAG00000014731 ↗

NCBI Gene ID

281181

Assembly

ARS-UCD2.0

Cross-check

✓ENSBTAT00000067004
✓ENSBTAT00000037753★
53bp41bp14bp100bp107bp91bp116bp82bp152bp79bp84bp98bp259bp
exon presentprimer binds hereconfirmed amplicongap = exon skipped~bp = boundary varies
How do I read this diagram?

Each row is one transcript, aligned on a shared axis. A gap means that isoform skips this exonic region. Each row's box is drawn at that isoform's own real exon length, which can be narrower than the column (alternative splice site); hover a box for its exact size. A ~amber header bp means isoforms don't all agree on this region's boundary, while a plain header means they do. Navy blocks mark where the primers bind, and green (with a ✓ by the name) means this isoform has a confirmed working amplicon, not just exon overlap. A row with a “‹ exons” / “exons ›” hint instead of any box means that isoform's exons exist but sit outside the current scroll position (a truncated isoform or alternate transcription start site) — click the hint to jump to them. Click a row to load it below.

★ = Ensembl canonical transcript (reference model, not necessarily the most expressed isoform)

Showing: ENSBTAT00000067004

1 (14bp)770bp100bp2296bp107bp3314bp91bp4310bp116bp5288bp82bp6411bp152bp7315bp79bp8259bp84bp9265bp98bp10457bp259bp11FRPredicted from the amplicon's own GC%+length (von Ahsen et al. 2001, at the same qPCR buffer as the primer Tm above: 50 mM Na⁺ plus 3 mM Mg²⁺ less 0.8 mM dNTP, as a sodium equivalent), not the SantaLucia model used for primer Tm, which isn't valid at this length. A screening estimate for ranking amplicons — that relation was fitted on oligonucleotide duplexes, so applying it at amplicon length carries more error than its published ±1.9 °C, and it is not a melt-peak prediction.119 bp amplicon · predicted amplicon Tm 88.2 °C
GAPDH · ENSBTAT00000067004⚠ Exon-junction spanning · short intron (<300bp), gDNA risk high

Off-target specificity

Specific

No paired forward+reverse off-target amplicon found against nt (whole genome/transcriptome). Screen requires >=2 total mismatches including >=2 within the last 5bp at the 3' end to clear a hit (NCBI Primer-BLAST-style stringency); hits with >=6 total mismatches are dropped as implausible.

Mean efficiency · Standard curve

2.000

from 1 measurement

Efficiency measurements

Ideal range:Dilution series 1.90–2.10·LinRegPCR 1.70–1.90·unknown method: not scored
EfficiencyR²MethodSourcePCR mixInstrumentAnnealingn
2.000100.0%
—Literature-reportedvia dilution seriesPMID 42633138SYBR Green Master Mix (Bio-Rad, #170-8887)CFX384 Real-Time PCR Detection System (Bio-Rad)60 °C2

Using these primers?

Analyse your qPCR run with LinRegPCR efficiency correction and a MIQE 2.0 report.

Analyse your data →