HELP：difference between SE1 and PE1 adapter

[lvxiaobao]

SE1 5'-ACACTCTTTCCCTACACGACC-TCTTCCGATC*T-3'
PE1 5'-ACACTCTTTCCCTACACGACGCTCTTCCGATC*T-3',
and
SE2 5’-AATGATACGGCGACCACCGAGATCTACACTCTTTCCCTACACGACGCTCTTCCGATC*T-3'
PE2 5’-AATGATACGGCGACCACCGAGATCTACACTCTTTCCCTACACGACGCTCTTCCGATC*T

as you can see, se2 and pe2 adapter are identical, what the use of se1? because both se2 and pe2 can't mathce se1 exactly?
thanks!

[maubp]

Unless you use [ code ] and [ /code ] round a sequence example, the forum will often format it in a funny way (e.g. inserting spaces for line breaks).

Is this what you meant?

SE1 5'-ACACTCTTTCCCTACACGACC-TCTTCCGATC*T-3'
PE1 5'-ACACTCTTTCCCTACACGACGCTCTTCCGATC*T-3'

and

SE2 5’-AATGATACGGCGACCACCGAGATCTACACTCTTTCCCTACACGACGCTCTTCCGATC*T-3'
PE2 5’-AATGATACGGCGACCACCGAGATCTACACTCTTTCCCTACACGACGCTCTTCCGATC*T-3'

[lvxiaobao]

yes, it,s what i mean.
i read the paper "Accurate Whole Human Genome Sequencing using Reversible Terminator Chemistry" of Bentley and found he use the same PE1 adapter in both single read and paired read libaries, then my question is :when should we use se1? se1 is just lack of "c" compared with pe1?
thanks!

[greigite]

yes, it,s what i mean.
i read the paper "Accurate Whole Human Genome Sequencing using Reversible Terminator Chemistry" of Bentley and found he use the same PE1 adapter in both single read and paired read libaries, then my question is :when should we use se1? se1 is just lack of "c" compared with pe1?
thanks!

There is no reason to use the SE adapters in your library prep, since PE adapters can also be used on a SE flow cell. Using PE adapters gives you maximum flexibility to decide between an SE or PE run. I've bolded the identical sections of the adapters for clarity below:

SE1 5'-[B]ACACTCTTTCCCTACACGAC[/B]C-[B]TCTTCCGATC*T[/B]-3'
PE1 5'-[B]ACACTCTTTCCCTACACGAC[/B]GC[B]TCTTCCGATC*T[/B]-3'

SE2 3'-GTTCGTCTTCTGCCGTATGCTC[B]GAGAAGGCTAG[/B]-p-5'
PE2 3'-GAGCCGTAAGGACGACTTGGC [B]GAGAAGGCTAG[/B]-p-5'

[kmcarr]

yes, it,s what i mean.
i read the paper "Accurate Whole Human Genome Sequencing using Reversible Terminator Chemistry" of Bentley and found he use the same PE1 adapter in both single read and paired read libaries, then my question is :when should we use se1? se1 is just lack of "c" compared with pe1?
thanks!

I think you are mistaken. Looking at the paper you cite, on page 1 of the Supplementary Information the sequences for SE oligo 1 and PE oligo 1 are identical. Did you copy those sequences for the original Supplementary Information or from a secondary source? (By the way, the oligo you typed is missing a 'G', not a 'C'.)

[maubp]

(By the way, the oligo you typed is missing a 'G', not a 'C'.)

I'd spotted that - it is just the gap character is in the wrong place:

SE1 5'-ACACTCTTTCCCTACACGACC-TCTTCCGATC*T-3'
PE1 5'-ACACTCTTTCCCTACACGACGCTCTTCCGATC*T-3'

this way makes it clearer a G is missing:

SE1 5'-ACACTCTTTCCCTACACGAC-CTCTTCCGATC*T-3'
PE1 5'-ACACTCTTTCCCTACACGACGCTCTTCCGATC*T-3'