Ligation of adaptors to digested samples.
Need to make new adaptors each time. Recipe below is for 10 samples (+1 for pipet error) to make adaptors at 2 uM. Combine and let sit for 10 minutes at room temp – I made sure stocks were completely melted.
Adaptor 1
|
11x
|
100 um 5ILL-NR
|
.6 uL
|
100 um Anti-ILL
|
.6 uL
|
NFW
|
58.8 uL
|
Adaptor 2
|
11x
|
100um 3ILL -NR
|
.6 uL
|
100um Anti-ILL
|
.6 uL
|
NFW
|
58.8 uL
|
Ligation reaction master mix
1x
|
11x
|
|
2 uM Adaptor 1
|
5 uL
|
55
|
1 uM Adaptor 2
|
5 uL
|
55
|
T4 ligase
|
1 uL
|
11
|
T4 ligase buffer with 10 mM ATP
|
4 uL
|
44
|
NFW
|
25
|
275
|
*Note: the Meyer protocol calls for 1.0 uL rATP and 4.0 uL T4 ligase buffer. My buffer had 10 mM rATP included, so I just used 25 uL of NFW instead of 24uL and did not add more rATP.
40 uL master mix with 10 uL of digested DNA. Held at 16degC for 2 hours and 15 minutes. Put in -20C.
Just out of curiosity, why did you deviate from the Meyer protocol? I’m sure they know that the T4 Ligase Buffer already contains ATP, so it seems like they need/want additional ATP in the ligation reaction.
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The Meyer protocol is very specific about reagents. When I saw that 10 mM ATP was listed on the front of the buffer, I assumed (maybe incorrectly) that that was a recent change to NEB’s buffer. You have a point though, I’ll order some NEB ATP and follow the protocol as listed.
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