A library of 50 enhancers, each tested in three different lengths and with two different promoters (300 combinations), was packaged into AAV9 and delivered to newborn mice. Enhancers were selected from the VISTA Enhancer Browser of transgenic reporter data, and included 25 candidates active in the embryonic myocardium and 25 negative control candidates active in embryonic endothelium but not in myocardium. In the heart, AAV9 selectively transduces cardiomyocytes. After collecting ventricles at P28, the reporter transcripts were sequenced, and the frequency of each barcode was compared to its frequency in the viral pool DNA. Here we provide fastq files for each sample, an Excel spreadsheet (MPRA-Metadata.xls) containing annotation, and an Excel spreadsheet (MPRA-counts.xlsx) containing extracted barcode counts for each enhancer, as well as additional annotation and calculated enhancer activity.

N.J.V. was funded by the National Institutes of Health, grant number R00HL143194.