{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:F75OYYQNTSX7IB5HEIVFLAZONO","short_pith_number":"pith:F75OYYQN","schema_version":"1.0","canonical_sha256":"2ffaec620d9caff407a7222a55832e6b959489a663b8af285ae81310f53ea0b7","source":{"kind":"arxiv","id":"0912.3954","version":1},"attestation_state":"computed","paper":{"title":"Nucleosome positioning and energetics: Recent advances in genomic and computational studies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.soft","q-bio.BM","q-bio.QM"],"primary_cat":"q-bio.GN","authors_text":"Alexandre V. Morozov, Denis Tolkunov","submitted_at":"2009-12-20T02:04:02Z","abstract_excerpt":"Chromatin is a complex of DNA, RNA and proteins whose primary function is to package genomic DNA into the tight confines of a cell nucleus. A fundamental repeating unit of chromatin is the nucleosome, an octamer of histone proteins around which 147 base pairs of DNA are wound in almost two turns of a left-handed superhelix. Chromatin is a dynamic structure which exerts profound influence on regulation of gene expression and other cellular functions. These chromatin-directed processes are facilitated by optimizing nucleosome positions throughout the genome and by remodeling nucleosomes in respo"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"0912.3954","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.GN","submitted_at":"2009-12-20T02:04:02Z","cross_cats_sorted":["cond-mat.soft","q-bio.BM","q-bio.QM"],"title_canon_sha256":"cbf79033015d3b640f0a20102bcf577993865bcc0963ff4366a504b3d87a644e","abstract_canon_sha256":"b961d52c36e33be40f79b2a22ae1186425b28849d82efafd64b226dfb4de763e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:53:07.311886Z","signature_b64":"9EYeQPdUb/WPX88McZWqTov5X6X5fLUtnrQdUWTooZ9a3hD9cKlpHb3chhDeTezu+DW8eI+KcrgEhBD2LLiTDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2ffaec620d9caff407a7222a55832e6b959489a663b8af285ae81310f53ea0b7","last_reissued_at":"2026-05-18T03:53:07.311343Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:53:07.311343Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Nucleosome positioning and energetics: Recent advances in genomic and computational studies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.soft","q-bio.BM","q-bio.QM"],"primary_cat":"q-bio.GN","authors_text":"Alexandre V. Morozov, Denis Tolkunov","submitted_at":"2009-12-20T02:04:02Z","abstract_excerpt":"Chromatin is a complex of DNA, RNA and proteins whose primary function is to package genomic DNA into the tight confines of a cell nucleus. A fundamental repeating unit of chromatin is the nucleosome, an octamer of histone proteins around which 147 base pairs of DNA are wound in almost two turns of a left-handed superhelix. Chromatin is a dynamic structure which exerts profound influence on regulation of gene expression and other cellular functions. These chromatin-directed processes are facilitated by optimizing nucleosome positions throughout the genome and by remodeling nucleosomes in respo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.3954","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"0912.3954","created_at":"2026-05-18T03:53:07.311412+00:00"},{"alias_kind":"arxiv_version","alias_value":"0912.3954v1","created_at":"2026-05-18T03:53:07.311412+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0912.3954","created_at":"2026-05-18T03:53:07.311412+00:00"},{"alias_kind":"pith_short_12","alias_value":"F75OYYQNTSX7","created_at":"2026-05-18T12:25:59.703012+00:00"},{"alias_kind":"pith_short_16","alias_value":"F75OYYQNTSX7IB5H","created_at":"2026-05-18T12:25:59.703012+00:00"},{"alias_kind":"pith_short_8","alias_value":"F75OYYQN","created_at":"2026-05-18T12:25:59.703012+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/F75OYYQNTSX7IB5HEIVFLAZONO","json":"https://pith.science/pith/F75OYYQNTSX7IB5HEIVFLAZONO.json","graph_json":"https://pith.science/api/pith-number/F75OYYQNTSX7IB5HEIVFLAZONO/graph.json","events_json":"https://pith.science/api/pith-number/F75OYYQNTSX7IB5HEIVFLAZONO/events.json","paper":"https://pith.science/paper/F75OYYQN"},"agent_actions":{"view_html":"https://pith.science/pith/F75OYYQNTSX7IB5HEIVFLAZONO","download_json":"https://pith.science/pith/F75OYYQNTSX7IB5HEIVFLAZONO.json","view_paper":"https://pith.science/paper/F75OYYQN","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0912.3954&json=true","fetch_graph":"https://pith.science/api/pith-number/F75OYYQNTSX7IB5HEIVFLAZONO/graph.json","fetch_events":"https://pith.science/api/pith-number/F75OYYQNTSX7IB5HEIVFLAZONO/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/F75OYYQNTSX7IB5HEIVFLAZONO/action/timestamp_anchor","attest_storage":"https://pith.science/pith/F75OYYQNTSX7IB5HEIVFLAZONO/action/storage_attestation","attest_author":"https://pith.science/pith/F75OYYQNTSX7IB5HEIVFLAZONO/action/author_attestation","sign_citation":"https://pith.science/pith/F75OYYQNTSX7IB5HEIVFLAZONO/action/citation_signature","submit_replication":"https://pith.science/pith/F75OYYQNTSX7IB5HEIVFLAZONO/action/replication_record"}},"created_at":"2026-05-18T03:53:07.311412+00:00","updated_at":"2026-05-18T03:53:07.311412+00:00"}