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CRISPR ribonucleoproteins confer high editing activity with transient exposure but lack intrinsic cell entry and targeting. Here we introduce PERCEPT, a delivery platform featuring reversible, covalent modification of CRISPR enzymes. PERCEPT enables modular installation of shielding polymers, amphiphilic delivery peptides and targeting ligands, allowing traceless cytosolic release of the native editor. A formulation incorporating an amphiphilic delivery peptide and the neuron-targeting ligand TET1 edited approximately 56% of striatal volume and 78% of neurons within edited regions after local striatal administration. In the R6\/2 Huntington\u2019s disease model, PERCEPT mediated targeted editing of the mutant human\n                  <jats:italic>HTT<\/jats:italic>\n                  transgene, reducing mutant huntingtin aggregate burden and shifting local transcriptional programs away from inflammatory and injury-associated states. Tissue-adapted formulations edited 53% of M\u00fcller glia following intravitreal delivery, increased skeletal muscle reporter fluorescence tenfold versus unconjugated control following intramuscular injection, and enabled lung airway epithelial cell that persisted for three months following intranasal delivery. Rapid screening revealed that local anatomical and cellular barriers require distinct surface display for optimal editing. These results establish reversible chemical modification as a general strategy for adapting CRISPR enzyme delivery across multiple target tissues\n                  <jats:italic>in vivo<\/jats:italic>\n                  .\n                <\/jats:p>","DOI":"10.64898\/2026.09.14.751351","type":"posted-content","created":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T06:10:27Z","timestamp":1789625427000},"source":"Crossref","is-referenced-by-count":0,"title":["Chemically modified CRISPR enzymes for multi-organ genome editing\n                  <i>in vivo<\/i>"],"prefix":"10.64898","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2618-1332","authenticated-orcid":false,"given":"Christopher M.","family":"Baehr","sequence":"first","affiliation":[{"name":"Innovative Genomics Institute, University of California Berkeley; Berkeley, CA, USA"},{"name":"University of California, Berkeley; Berkeley, CA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3021-1525","authenticated-orcid":false,"given":"Alzbeta","family":"Ressnerova","sequence":"additional","affiliation":[{"name":"Innovative Genomics Institute, University of California Berkeley; 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