Genes expected to be absent, or expressed at a notably low level, in these cells, and whose absence supports the assignment of this cell annotation.
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Rationale
NEUROG3 expression identifies EEC subclusters that are just starting their differentiation away from secretory progenitor / epithstem identity towards EEC subtypes
Cell annotations (Prelim annotation) are based on the finest possible label that could be used to describe each of the ~500 clusters found during integration and subclustering
