Abstract: A method of identifying a molecular composition and a spatial position of a single cell comprised in a 3 dimensional structure comprising a plurality of cells is provided.

Abstract: In some aspects, described herein is a DNA methylation reporter. In some aspects, the DNA methylation reporter comprises a promoter whose activity can be affected by exogenous methylation changes without being independently regulated by the DNA methylation machinery, operably linked to a DNA sequence that encodes a reporter molecule. In some embodiments the DNA methylation reporter comprises (i) a promoter derived from a mammalian imprinted gene promoter; and (ii) a sequence that encodes a reporter molecule that is detectable in individual mammalian cells, wherein the promoter is operably linked to the sequence that encodes the reporter molecule. Also described are nucleic acids that comprise the DNA methylation reporter, cells that have the DNA methylation reporter integrated into their genome, and non-human mammals comprising cells that have the DNA methylation reporter integrated into their genome.

Abstract: In some aspects, described herein is a DNA methylation reporter. In some aspects, the DNA methylation reporter comprises a promoter whose activity can be affected by exogenous methylation changes without being independently regulated by the DNA methylation machinery, operably linked to a DNA sequence that encodes a reporter molecule. In some embodiments the DNA methylation reporter comprises (i) a promoter derived from a mammalian imprinted gene promoter; and (ii) a sequence that encodes a reporter molecule that is detectable in individual mammalian cells, wherein the promoter is operably linked to the sequence that encodes the reporter molecule. Also described are nucleic acids that comprise the DNA methylation reporter, cells that have the DNA methylation reporter integrated into their genome, and non-human mammals comprising cells that have the DNA methylation reporter integrated into their genome.

Abstract: In some aspects, described herein is a DNA methylation reporter. In some aspects, the DNA methylation reporter comprises a promoter whose activity can be affected by exogenous methylation changes without being independently regulated by the DNA methylation machinery, operably linked to a DNA sequence that encodes a reporter molecule. In some embodiments the DNA methylation reporter comprises (i) a promoter derived from a mammalian imprinted gene promoter; and (ii) a sequence that encodes a reporter molecule that is detectable in individual mammalian cells, wherein the promoter is operably linked to the sequence that encodes the reporter molecule. Also described are nucleic acids that comprise the DNA methylation reporter, cells that have the DNA methylation reporter integrated into their genome, and non-human mammals comprising cells that have the DNA methylation reporter integrated into their genome.