Abstract: Provided herein are methods for spatial analysis of proteins and/or nucleic acids by capturing a capture handle sequence and/or a connected probe to a capture domain of a capture probe on a spatial array. In some instances, a reagent medium including a monovalent or divalent salt, ethylene carbonate, and/or glycerol is used in the disclosed methods.

Abstract: Provided herein are methods for capturing an exogenous probe and/or a capture handle sequence to a capture domain of a capture probe. Compositions, systems, and kits also are disclosed. In some instances, the methods include detecting an exogenous nucleic acid in a biological sample by hybridizing a first exogenous probe oligonucleotide and a second exogenous probe oligonucleotide to an exogenous nucleic acid in a biological sample on a first substrate, coupling the exogenous probe oligonucleotides, and capturing the coupled exogenous probe on a spatial array.

Abstract: Provided herein are methods, compositions and systems for identifying spatial gene expression of analytes from glioblastoma derived tissue. The methods discloses herein include using templated ligation probe pairs to identify location of a disease proliferating region in a glioblastoma-derived sample by detecting analytes in the region and hybridizing a ligation product comprising the probe pairs to a capture probe on a spatial array.