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Common problems analysis for TF-Centered Y1H

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1. Why is the library length of random sequences only 7bp?

Normally, DNA motifs are fairly short (5-20 base pairs [bp] in length).  The motif length ranges from 2 to 10 bases. The graphic presentation and analysis of the motif distribution found that the motif length range is mainly concentrated from 2 to 10 bases.

Considering the workload and cost of new element’s boundary determination, we recommend 7bp;


2. Why is the random sequence inserted into the SmaI digestion site?

Because this enzymatic sequence is CCCGG, this sequence can be used exactly as a marker site to identify the inserted sequence, that is, it forms CCCHNNNNNNCGGG with CCC and GGG as marker sites.

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