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Send a message via the NCBI Helpdesk Web Form.

  • Submit questions about NCBI and its programs and services
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PubMed Customer Service

PubMed Central (PMC) Customer Service

BLAST blast-help@ncbi.nlm.nih.gov

  • Submit technical questions on running or interperting BLAST sequence comparison searches

GenBank Help gb-admin@ncbi.nlm.nih.gov

  • Submit comments or questions about a sequence
  • E-mail simple updates to submissions
  • E-mail a completed sequence update prepared with Sequin

GenBank Submissions gb-sub@ncbi.nlm.nih.gov

  • E-mail completed Sequin submission files

Sequence Submission Help info@ncbi.nlm.nih.gov

  • Assistance with record annotation

Gene and Reference Sequences (RefSeq) Feedback

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