Pith Number

pith:QRC54KJQ

pith:2012:QRC54KJQNOQZLGC2IJQYLVQWJT

not attested not anchored not stored refs pending

In silico screening of 393 mutants facilitates enzyme engineering of amidase activity in CalB

Allan Svendsen, Christian J\"ackel, Jan H. Jensen, Julie B. Rannes, Luca De Vico, Martin R. Hediger, Werner Besenmatter

arxiv:1209.4469 v1 · 2012-09-20 · q-bio.BM · physics.chem-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QRC54KJQNOQZLGC2IJQYLVQWJT}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T03:13:23.648326Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8445de29306ba195985a426185d6164ceedd47627cb548cd8140a839c582147d

Aliases

arxiv: 1209.4469 · arxiv_version: 1209.4469v1 · doi: 10.48550/arxiv.1209.4469 · pith_short_12: QRC54KJQNOQZ · pith_short_16: QRC54KJQNOQZLGC2 · pith_short_8: QRC54KJQ

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/QRC54KJQNOQZLGC2IJQYLVQWJT \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 8445de29306ba195985a426185d6164ceedd47627cb548cd8140a839c582147d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "48e6bdd43df9d6b4175b43911a0e0f801babe9aa2baa6a16a3e3df59252ae3d6",
    "cross_cats_sorted": [
      "physics.chem-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.BM",
    "submitted_at": "2012-09-20T09:21:16Z",
    "title_canon_sha256": "c170ee2bd3d0eb8ff74f93b3e79dab38401b253d81aa91abac1f9e11372597f3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.4469",
    "kind": "arxiv",
    "version": 1
  }
}