{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:WVKC2XPI2AYN6QWLHCBYB4ISMN","short_pith_number":"pith:WVKC2XPI","schema_version":"1.0","canonical_sha256":"b5542d5de8d030df42cb388380f1126362e52e674e1840ead3ef69561ed6d231","source":{"kind":"arxiv","id":"1503.05334","version":1},"attestation_state":"computed","paper":{"title":"Structuring of counterions around dna double helix: a molecular dynamics study","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"q-bio.BM","authors_text":"A.V. Vlasiuk, O.O. Liubysh, S.M. Perepelytsya","submitted_at":"2015-03-18T10:39:11Z","abstract_excerpt":"Structuring of DNA counterions around the double helix has been studied by the molecular dynamics method. A DNA dodecamer d(CGCGAATTCGCG) in water solution with the alkali metal counterions Na$^{+}$, K$^{+}$, and Cs$^{+}$ has been simulated. The systems have been considered in the regimes without excess salt and with different salts (0.5 M of NaCl, KCl or CsCl) added. The results have showed that the Na$^{+}$ counterions interact with the phosphate groups directly from outside of the double helix and via water molecules at the top edge of DNA minor groove. The potassium ions are mostly localiz"},"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":"1503.05334","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.BM","submitted_at":"2015-03-18T10:39:11Z","cross_cats_sorted":[],"title_canon_sha256":"8b9cf4ff8bcf4ef4b14552bef8f1afcb87bcf5739a110a9a2c2058890eca945c","abstract_canon_sha256":"4d18212b1e47134e40b018c0e4f45eec901798c2b425ad3b4725be77e4f3c276"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:21:50.751730Z","signature_b64":"n3JIszzMxunne0LcBLgRWtWFNHWd7maTkdtZkdDADB3SUxSSauAyRNCPaQZ9k5/suSbNltDLQmOmZaNoFRQ6BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b5542d5de8d030df42cb388380f1126362e52e674e1840ead3ef69561ed6d231","last_reissued_at":"2026-05-18T02:21:50.751116Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:21:50.751116Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Structuring of counterions around dna double helix: a molecular dynamics study","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"q-bio.BM","authors_text":"A.V. Vlasiuk, O.O. Liubysh, S.M. Perepelytsya","submitted_at":"2015-03-18T10:39:11Z","abstract_excerpt":"Structuring of DNA counterions around the double helix has been studied by the molecular dynamics method. A DNA dodecamer d(CGCGAATTCGCG) in water solution with the alkali metal counterions Na$^{+}$, K$^{+}$, and Cs$^{+}$ has been simulated. The systems have been considered in the regimes without excess salt and with different salts (0.5 M of NaCl, KCl or CsCl) added. The results have showed that the Na$^{+}$ counterions interact with the phosphate groups directly from outside of the double helix and via water molecules at the top edge of DNA minor groove. The potassium ions are mostly localiz"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.05334","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":"1503.05334","created_at":"2026-05-18T02:21:50.751225+00:00"},{"alias_kind":"arxiv_version","alias_value":"1503.05334v1","created_at":"2026-05-18T02:21:50.751225+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.05334","created_at":"2026-05-18T02:21:50.751225+00:00"},{"alias_kind":"pith_short_12","alias_value":"WVKC2XPI2AYN","created_at":"2026-05-18T12:29:47.479230+00:00"},{"alias_kind":"pith_short_16","alias_value":"WVKC2XPI2AYN6QWL","created_at":"2026-05-18T12:29:47.479230+00:00"},{"alias_kind":"pith_short_8","alias_value":"WVKC2XPI","created_at":"2026-05-18T12:29:47.479230+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/WVKC2XPI2AYN6QWLHCBYB4ISMN","json":"https://pith.science/pith/WVKC2XPI2AYN6QWLHCBYB4ISMN.json","graph_json":"https://pith.science/api/pith-number/WVKC2XPI2AYN6QWLHCBYB4ISMN/graph.json","events_json":"https://pith.science/api/pith-number/WVKC2XPI2AYN6QWLHCBYB4ISMN/events.json","paper":"https://pith.science/paper/WVKC2XPI"},"agent_actions":{"view_html":"https://pith.science/pith/WVKC2XPI2AYN6QWLHCBYB4ISMN","download_json":"https://pith.science/pith/WVKC2XPI2AYN6QWLHCBYB4ISMN.json","view_paper":"https://pith.science/paper/WVKC2XPI","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1503.05334&json=true","fetch_graph":"https://pith.science/api/pith-number/WVKC2XPI2AYN6QWLHCBYB4ISMN/graph.json","fetch_events":"https://pith.science/api/pith-number/WVKC2XPI2AYN6QWLHCBYB4ISMN/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/WVKC2XPI2AYN6QWLHCBYB4ISMN/action/timestamp_anchor","attest_storage":"https://pith.science/pith/WVKC2XPI2AYN6QWLHCBYB4ISMN/action/storage_attestation","attest_author":"https://pith.science/pith/WVKC2XPI2AYN6QWLHCBYB4ISMN/action/author_attestation","sign_citation":"https://pith.science/pith/WVKC2XPI2AYN6QWLHCBYB4ISMN/action/citation_signature","submit_replication":"https://pith.science/pith/WVKC2XPI2AYN6QWLHCBYB4ISMN/action/replication_record"}},"created_at":"2026-05-18T02:21:50.751225+00:00","updated_at":"2026-05-18T02:21:50.751225+00:00"}