{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:FJ6KBHNPGGSKFCCXRHIFTKT24C","short_pith_number":"pith:FJ6KBHNP","canonical_record":{"source":{"id":"1203.6451","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2012-03-29T07:41:37Z","cross_cats_sorted":["physics.bio-ph","q-bio.BM"],"title_canon_sha256":"22444e0a1be76c74a14d29a90bb35110f7b3b0f9cb101e6445a5d545015b0205","abstract_canon_sha256":"babdad66e4b6b7e467b5c536593dfb17ac155afef32cdf8af68fba046bba5da3"},"schema_version":"1.0"},"canonical_sha256":"2a7ca09daf31a4a2885789d059aa7ae0a77ef37815d75fb34f035da79386f8b4","source":{"kind":"arxiv","id":"1203.6451","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.6451","created_at":"2026-05-18T01:58:00Z"},{"alias_kind":"arxiv_version","alias_value":"1203.6451v1","created_at":"2026-05-18T01:58:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.6451","created_at":"2026-05-18T01:58:00Z"},{"alias_kind":"pith_short_12","alias_value":"FJ6KBHNPGGSK","created_at":"2026-05-18T12:27:06Z"},{"alias_kind":"pith_short_16","alias_value":"FJ6KBHNPGGSKFCCX","created_at":"2026-05-18T12:27:06Z"},{"alias_kind":"pith_short_8","alias_value":"FJ6KBHNP","created_at":"2026-05-18T12:27:06Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:FJ6KBHNPGGSKFCCXRHIFTKT24C","target":"record","payload":{"canonical_record":{"source":{"id":"1203.6451","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2012-03-29T07:41:37Z","cross_cats_sorted":["physics.bio-ph","q-bio.BM"],"title_canon_sha256":"22444e0a1be76c74a14d29a90bb35110f7b3b0f9cb101e6445a5d545015b0205","abstract_canon_sha256":"babdad66e4b6b7e467b5c536593dfb17ac155afef32cdf8af68fba046bba5da3"},"schema_version":"1.0"},"canonical_sha256":"2a7ca09daf31a4a2885789d059aa7ae0a77ef37815d75fb34f035da79386f8b4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:58:00.600054Z","signature_b64":"S2DBixQGvew9TcTj2Bm6FAuDuOLaoENzIaDL3eKjtHrRA5a3EqQ9bmuC3HIWuH/hAcHCh9PCmKjY/rap1NVdAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2a7ca09daf31a4a2885789d059aa7ae0a77ef37815d75fb34f035da79386f8b4","last_reissued_at":"2026-05-18T01:58:00.599646Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:58:00.599646Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1203.6451","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:58:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pnGNGXvY7crhTqLFVP4W/OH5K0jMXfKYxprkhi0dqawqRdQnlfsBRxBNmeaaRvoK+Zw24Q2R2JxT0YVpA6j1CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T08:20:03.920786Z"},"content_sha256":"0eda9cf73c7b7d30c569fe3e339fe658929c8f94adbddce88783ad165e76e3b7","schema_version":"1.0","event_id":"sha256:0eda9cf73c7b7d30c569fe3e339fe658929c8f94adbddce88783ad165e76e3b7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:FJ6KBHNPGGSKFCCXRHIFTKT24C","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Stretching force dependent transitions in single stranded DNA","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.bio-ph","q-bio.BM"],"primary_cat":"cond-mat.soft","authors_text":"Anirban Sain, Kulveer Singh, Sanjay Kumar, Surya K. Ghosh","submitted_at":"2012-03-29T07:41:37Z","abstract_excerpt":"Mechanical properties of DNA, in particular their stretch dependent extension and their loop formation characteristics, have been recognized as an effective probe for understanding the possible biochemical role played by them in a living cell. Single stranded DNA (ssDNA), which, till recently was presumed to be an simple flexible polymer continues to spring surprises. Synthetic ssDNA, like polydA (polydeoxyadenosines) has revealed an intriguing force-extension (FX) behavior exhibiting two plateaus, absent in polydT (polydeoxythymidines) for example. Loop closing time in polydA had also been fo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.6451","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:58:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3L4/QM4ID1REKpFImAih6drbn28igt6uVOEeKMWsAiF3EFE2kFXvxPEfSzgdKF6RwALbW0z2lnvG/kx+CKdfCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T08:20:03.921134Z"},"content_sha256":"9ddbe576d4ec1e746a0a4b8c63c9a8c96fe8d79231bf685f4a851b9dc3b70e14","schema_version":"1.0","event_id":"sha256:9ddbe576d4ec1e746a0a4b8c63c9a8c96fe8d79231bf685f4a851b9dc3b70e14"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FJ6KBHNPGGSKFCCXRHIFTKT24C/bundle.json","state_url":"https://pith.science/pith/FJ6KBHNPGGSKFCCXRHIFTKT24C/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FJ6KBHNPGGSKFCCXRHIFTKT24C/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":"2026-06-01T08:20:03Z","links":{"resolver":"https://pith.science/pith/FJ6KBHNPGGSKFCCXRHIFTKT24C","bundle":"https://pith.science/pith/FJ6KBHNPGGSKFCCXRHIFTKT24C/bundle.json","state":"https://pith.science/pith/FJ6KBHNPGGSKFCCXRHIFTKT24C/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FJ6KBHNPGGSKFCCXRHIFTKT24C/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:FJ6KBHNPGGSKFCCXRHIFTKT24C","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":"babdad66e4b6b7e467b5c536593dfb17ac155afef32cdf8af68fba046bba5da3","cross_cats_sorted":["physics.bio-ph","q-bio.BM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2012-03-29T07:41:37Z","title_canon_sha256":"22444e0a1be76c74a14d29a90bb35110f7b3b0f9cb101e6445a5d545015b0205"},"schema_version":"1.0","source":{"id":"1203.6451","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.6451","created_at":"2026-05-18T01:58:00Z"},{"alias_kind":"arxiv_version","alias_value":"1203.6451v1","created_at":"2026-05-18T01:58:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.6451","created_at":"2026-05-18T01:58:00Z"},{"alias_kind":"pith_short_12","alias_value":"FJ6KBHNPGGSK","created_at":"2026-05-18T12:27:06Z"},{"alias_kind":"pith_short_16","alias_value":"FJ6KBHNPGGSKFCCX","created_at":"2026-05-18T12:27:06Z"},{"alias_kind":"pith_short_8","alias_value":"FJ6KBHNP","created_at":"2026-05-18T12:27:06Z"}],"graph_snapshots":[{"event_id":"sha256:9ddbe576d4ec1e746a0a4b8c63c9a8c96fe8d79231bf685f4a851b9dc3b70e14","target":"graph","created_at":"2026-05-18T01:58:00Z","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":"Mechanical properties of DNA, in particular their stretch dependent extension and their loop formation characteristics, have been recognized as an effective probe for understanding the possible biochemical role played by them in a living cell. Single stranded DNA (ssDNA), which, till recently was presumed to be an simple flexible polymer continues to spring surprises. Synthetic ssDNA, like polydA (polydeoxyadenosines) has revealed an intriguing force-extension (FX) behavior exhibiting two plateaus, absent in polydT (polydeoxythymidines) for example. Loop closing time in polydA had also been fo","authors_text":"Anirban Sain, Kulveer Singh, Sanjay Kumar, Surya K. Ghosh","cross_cats":["physics.bio-ph","q-bio.BM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2012-03-29T07:41:37Z","title":"Stretching force dependent transitions in single stranded DNA"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.6451","kind":"arxiv","version":1},"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":"sha256:0eda9cf73c7b7d30c569fe3e339fe658929c8f94adbddce88783ad165e76e3b7","target":"record","created_at":"2026-05-18T01:58:00Z","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":"babdad66e4b6b7e467b5c536593dfb17ac155afef32cdf8af68fba046bba5da3","cross_cats_sorted":["physics.bio-ph","q-bio.BM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2012-03-29T07:41:37Z","title_canon_sha256":"22444e0a1be76c74a14d29a90bb35110f7b3b0f9cb101e6445a5d545015b0205"},"schema_version":"1.0","source":{"id":"1203.6451","kind":"arxiv","version":1}},"canonical_sha256":"2a7ca09daf31a4a2885789d059aa7ae0a77ef37815d75fb34f035da79386f8b4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2a7ca09daf31a4a2885789d059aa7ae0a77ef37815d75fb34f035da79386f8b4","first_computed_at":"2026-05-18T01:58:00.599646Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:00.599646Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"S2DBixQGvew9TcTj2Bm6FAuDuOLaoENzIaDL3eKjtHrRA5a3EqQ9bmuC3HIWuH/hAcHCh9PCmKjY/rap1NVdAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:00.600054Z","signed_message":"canonical_sha256_bytes"},"source_id":"1203.6451","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0eda9cf73c7b7d30c569fe3e339fe658929c8f94adbddce88783ad165e76e3b7","sha256:9ddbe576d4ec1e746a0a4b8c63c9a8c96fe8d79231bf685f4a851b9dc3b70e14"],"state_sha256":"eb9460b883fe9dde4a6b7a197b2aa6dfc4ebf9d43863cc3b7288eacc248f11bc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fCrvn7ZKAvwwaTMf77RKb+LuCImzYOGKBZmJTQxbN0Td3sVba2TWpl0mhIuhv5hp9acCA3O46/BD8Waie9dnDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T08:20:03.923130Z","bundle_sha256":"f07b26a83910fe6fdae6518b0d6848ded9c2573bd3b841331875f0cadf11a857"}}