This online viewer shows a spatial cell map of human developing heart at 6.5 PCW timepoint.

We used in situ sequencing to map the expression of 69 genes human 6.5 PCW heart.

The visualization window on the left shows where the RNA molecules were detected. Each colored symbol represents an RNA detection – hover over a symbol to see what gene it represents. The white blobs show cell nuclei, and the gray dotted lines show their estimated borders. Hover over a cell to see what genes were assigned to it (they will connect by lines), and what cell classes it might belong to (in the bottom left corner). Click on a cell to show even more information, in the lower right panels.

Use the Section Overview (top right panel) to zoom around – click any cell and it will take you straight there. To show data from a different section, click “Select Tissue Section", in top left corner of the window.

A full description of the study and data is can be found in the manuscript "A spatiotemporal organ-wide gene expression and cell atlas of the developing human heart".

The call typing algorithms was described in this paper.