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A study of DNA editing tags shows how a useful lab shortcut can change the result.

Read the complete cPRIME breakdown

Human cell lines

A DNA tag can change how RNA is processed

The cPRIME screen used marker tags to distinguish edits from sequencing errors. Some edit-and-marker pairings also created splice signals, changing the RNA result they were meant to help measure.

Variants measurable above background

With markersnearly 90%
Without markersabout 10%

Human cell lines

Markers made more variants measurable

In leukemia cell cultures, nearly 90% of variants were quantifiable above background with markers, versus about 10% without. Removing a marker reduced the predicted splice effect, though one variant still lowered RNA reads.

Variants measurable above background

With markersnearly 90%
Without markersabout 10%

Human cell lines

Find out why some RNA forms are depleted

The authors propose long-read transcript sequencing to examine altered RNA forms. Blocking RNA decay could help distinguish transcript loss from changes in splicing.

Variants measurable above background

With markersnearly 90%
Without markersabout 10%