{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:ITSKFLUM4CGKQMSAPS2FOMJUOD","short_pith_number":"pith:ITSKFLUM","canonical_record":{"source":{"id":"1206.0924","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2012-05-31T20:02:53Z","cross_cats_sorted":["q-bio.BM"],"title_canon_sha256":"915507285b3807977a7f02a41eb10939df53f5a8163552b03dc79ad94c0a041b","abstract_canon_sha256":"4a5c49b694601739b94452a654c539b83261740952b7f6ea3a6cd36bd5e1ab91"},"schema_version":"1.0"},"canonical_sha256":"44e4a2ae8ce08ca832407cb457313470f45a912e7a33e3cf0f278f0146e79598","source":{"kind":"arxiv","id":"1206.0924","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.0924","created_at":"2026-05-18T01:57:07Z"},{"alias_kind":"arxiv_version","alias_value":"1206.0924v3","created_at":"2026-05-18T01:57:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.0924","created_at":"2026-05-18T01:57:07Z"},{"alias_kind":"pith_short_12","alias_value":"ITSKFLUM4CGK","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_16","alias_value":"ITSKFLUM4CGKQMSA","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_8","alias_value":"ITSKFLUM","created_at":"2026-05-18T12:27:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:ITSKFLUM4CGKQMSAPS2FOMJUOD","target":"record","payload":{"canonical_record":{"source":{"id":"1206.0924","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2012-05-31T20:02:53Z","cross_cats_sorted":["q-bio.BM"],"title_canon_sha256":"915507285b3807977a7f02a41eb10939df53f5a8163552b03dc79ad94c0a041b","abstract_canon_sha256":"4a5c49b694601739b94452a654c539b83261740952b7f6ea3a6cd36bd5e1ab91"},"schema_version":"1.0"},"canonical_sha256":"44e4a2ae8ce08ca832407cb457313470f45a912e7a33e3cf0f278f0146e79598","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:57:07.648803Z","signature_b64":"b0oZRi5yYXptJSyvYN99z+rxxgGy1PaAZtt7pGTzWiGyD/NwT68Z7xNoiGSXnshzv0iNhnLVneUPQV7v+iCtAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"44e4a2ae8ce08ca832407cb457313470f45a912e7a33e3cf0f278f0146e79598","last_reissued_at":"2026-05-18T01:57:07.648250Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:57:07.648250Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1206.0924","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:57:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LjG2YIr5JTyYHxi2VcyIZMTvpuhTnDEAijfuSe/VmP3Q3JQBkD/gGllSl0LXhECqCTKjRTn3kCg1SR/rj913Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T17:55:22.317948Z"},"content_sha256":"0a4d75804b073e064b4f81b6fd5e3f32ecc9d4768750c3b1ebb1783cf430d0e4","schema_version":"1.0","event_id":"sha256:0a4d75804b073e064b4f81b6fd5e3f32ecc9d4768750c3b1ebb1783cf430d0e4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:ITSKFLUM4CGKQMSAPS2FOMJUOD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Transcription and the Pitch Angle of DNA","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["q-bio.BM"],"primary_cat":"physics.bio-ph","authors_text":"Jakob Bohr, Kasper W. Olsen","submitted_at":"2012-05-31T20:02:53Z","abstract_excerpt":"The question of the value of the pitch angle of DNA is visited from the perspective of a geometrical analysis of transcription. It is suggested that for transcription to be possible, the pitch angle of B-DNA must be smaller than the angle of zero-twist. At the zero-twist angle the double helix is maximally rotated and its strain-twist coupling vanishes. A numerical estimate of the pitch angle for B-DNA based on differential geometry is compared with numbers obtained from existing empirical data. The crystallographic studies shows that the pitch angle is approximately 38 deg., less than the cor"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.0924","kind":"arxiv","version":3},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:57:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"o7ZrFuE1MWRqFDywYFUEMPqBQGQBHKkQ2JyHI1CDrfLoO7FxazJg8ReWZxTI0mypTHc6mdmeZ5ssL7mzy5gwBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T17:55:22.318297Z"},"content_sha256":"f9d38d6ec42e14baa12f2887afb63af2ad9601b0e08c4ae05b035b97e7d88d55","schema_version":"1.0","event_id":"sha256:f9d38d6ec42e14baa12f2887afb63af2ad9601b0e08c4ae05b035b97e7d88d55"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ITSKFLUM4CGKQMSAPS2FOMJUOD/bundle.json","state_url":"https://pith.science/pith/ITSKFLUM4CGKQMSAPS2FOMJUOD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ITSKFLUM4CGKQMSAPS2FOMJUOD/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-02T17:55:22Z","links":{"resolver":"https://pith.science/pith/ITSKFLUM4CGKQMSAPS2FOMJUOD","bundle":"https://pith.science/pith/ITSKFLUM4CGKQMSAPS2FOMJUOD/bundle.json","state":"https://pith.science/pith/ITSKFLUM4CGKQMSAPS2FOMJUOD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ITSKFLUM4CGKQMSAPS2FOMJUOD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:ITSKFLUM4CGKQMSAPS2FOMJUOD","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"4a5c49b694601739b94452a654c539b83261740952b7f6ea3a6cd36bd5e1ab91","cross_cats_sorted":["q-bio.BM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2012-05-31T20:02:53Z","title_canon_sha256":"915507285b3807977a7f02a41eb10939df53f5a8163552b03dc79ad94c0a041b"},"schema_version":"1.0","source":{"id":"1206.0924","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.0924","created_at":"2026-05-18T01:57:07Z"},{"alias_kind":"arxiv_version","alias_value":"1206.0924v3","created_at":"2026-05-18T01:57:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.0924","created_at":"2026-05-18T01:57:07Z"},{"alias_kind":"pith_short_12","alias_value":"ITSKFLUM4CGK","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_16","alias_value":"ITSKFLUM4CGKQMSA","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_8","alias_value":"ITSKFLUM","created_at":"2026-05-18T12:27:09Z"}],"graph_snapshots":[{"event_id":"sha256:f9d38d6ec42e14baa12f2887afb63af2ad9601b0e08c4ae05b035b97e7d88d55","target":"graph","created_at":"2026-05-18T01:57:07Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"The question of the value of the pitch angle of DNA is visited from the perspective of a geometrical analysis of transcription. It is suggested that for transcription to be possible, the pitch angle of B-DNA must be smaller than the angle of zero-twist. At the zero-twist angle the double helix is maximally rotated and its strain-twist coupling vanishes. A numerical estimate of the pitch angle for B-DNA based on differential geometry is compared with numbers obtained from existing empirical data. The crystallographic studies shows that the pitch angle is approximately 38 deg., less than the cor","authors_text":"Jakob Bohr, Kasper W. Olsen","cross_cats":["q-bio.BM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2012-05-31T20:02:53Z","title":"Transcription and the Pitch Angle of DNA"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.0924","kind":"arxiv","version":3},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:0a4d75804b073e064b4f81b6fd5e3f32ecc9d4768750c3b1ebb1783cf430d0e4","target":"record","created_at":"2026-05-18T01:57:07Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"4a5c49b694601739b94452a654c539b83261740952b7f6ea3a6cd36bd5e1ab91","cross_cats_sorted":["q-bio.BM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2012-05-31T20:02:53Z","title_canon_sha256":"915507285b3807977a7f02a41eb10939df53f5a8163552b03dc79ad94c0a041b"},"schema_version":"1.0","source":{"id":"1206.0924","kind":"arxiv","version":3}},"canonical_sha256":"44e4a2ae8ce08ca832407cb457313470f45a912e7a33e3cf0f278f0146e79598","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"44e4a2ae8ce08ca832407cb457313470f45a912e7a33e3cf0f278f0146e79598","first_computed_at":"2026-05-18T01:57:07.648250Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:57:07.648250Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"b0oZRi5yYXptJSyvYN99z+rxxgGy1PaAZtt7pGTzWiGyD/NwT68Z7xNoiGSXnshzv0iNhnLVneUPQV7v+iCtAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:57:07.648803Z","signed_message":"canonical_sha256_bytes"},"source_id":"1206.0924","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0a4d75804b073e064b4f81b6fd5e3f32ecc9d4768750c3b1ebb1783cf430d0e4","sha256:f9d38d6ec42e14baa12f2887afb63af2ad9601b0e08c4ae05b035b97e7d88d55"],"state_sha256":"1d4d999aec08f8971b579bc22335fde10715c8561b1c8e4495577f8af5f8007d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7BzNvtMPJfcR28EJG9JfquxgUmf2SuwEZ2AaduC0VtoSVrzopuVitDZiHjaMz9KD5endr0ZsCdIlnHKEcoR0BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T17:55:22.320356Z","bundle_sha256":"ecc9d867be9ecca23d1084cc97a7c3ad13a87bcf24123bf2c957f2c987799df1"}}