(A) Schematic representation of data transfer between
scRNA-seq and STARmap datasets. After identifying anchors using the subset of
genes measured in both experiments, we subsequently transfer sequencing data to
the STARmap cells, predicting new spatial expression patterns. (B)
Leave-one-out cross validation for 8 genes, exhibiting predicted expression
patterns, and original STARmap measurements. (C) Gene expression
patterns for Rorb, Syt6, Lamp5 and Sox10, as
measured by osmFISH, a highly sensitive single molecular assay [Codeluppi et al., 2018], in the mouse somatosensory
cortex. (D) Predicted expression patterns for four genes not
originally profiled by STARmap, with external validation in Supplementary File 2.
(E) Correlation between Moran’s I value, a measure of
spatial autocorrelation, for each predicted gene expression pattern in two
STARmap replicates. Marker genes for VLMC cells, endothelial cells, and
perivascular macrophages are highlighted, reflecting rare cell subsets that were
spatially restricted in only one replicate. (F)
Horizontally-compressed STARmap cells with predicted cell type transferred from
the SMART-seq2 dataset. (G) Expression of cell type marker genes in
each predicted STARmap cell type (both replicates combined).