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Is there a PCA showing the relative distance in terms of gene expression / functional genomics among the different human tissue types?
So far I have found:
(1) A paper based on gene expression with some tissues/tissue groups, not many: https://genomebiology.biomedcentral.com/articles/10.1186/gb-2010-11-12-r124
(2) A paper based on gene expression signatures and aging: https://www.nature.com/articles/npjamd201614/figures/1
(3) A paper on Gene and Protein Expression in Normal and Cancer Tissues: https://www.nature.com/articles/srep24799/figures/3
You can navigate the GTEX project. PCA section.
You have different samples for many tissues. Currently you can navigate it tissue by tissue but perhaps there's a way of visualizing the whole dataset (or you can ask for it).