Table 2 Summary of single-plex bisulfite PCR results where the modified base is located near the centre or 5′ end of the forward primer.

From: Evaluation of Different Oligonucleotide Base Substitutions at CpG Binding sites in Multiplex Bisulfite-PCR sequencing

Forward Primer

Reverse Primer

Position of modification

Deoxyinosine

Mixed base

5-nitroindole

Dspacer

CpG-free control

C571

C572

None

Positive

C575

C576

None

Positive

C601

C602

Centre

Positive

Positive

No amplification

No amplification

C603

C604

Centre

Positive

Positive

No amplification

No amplification

C605

C606

Centre

Positive$

Positive$

No amplification

No amplification

C607

C608

Centre

Positive

Positive

No amplification

No amplification

C609

C610

Centre

Positive$

Positive$

No amplification

No amplification

C611

C612

5′

Positive

Positive

No amplification

No amplification

C613

C614

5′

Positive

Positive

Positive

Positive

C615

C616

5’

Positive

Positive

Positive

Positive

C617

C618

5′

Positive

Positive

No amplification

No amplification

C619

C620

5′

Positive

Positive

No amplification

No amplification

  1. *Modified base is located near ‘centre’ or 5′ terminus of the forward primer, None is indicated for ‘CpG-free’ primer controls; $Additional products seen on gel. Primer sequences are supplied in Supp Table 2.