The disclosure provides methods to isolate genome or chromosome level structural information from preserved samples. In some cases, samples preserved under conditions where long-range nucleic acid information is believed to be irreparably lost, such as FFPE samples, are treated to recover nucleic acid-protein complexes stabilized as part of the sample preservation process. The complexes are processed so as to recover information regarding which nucleic acids are bound to a common complex, and the information is used to recover genomic structural information.
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