NCBI

Starting with...

A GENE NAME

1. Search the Gene database with the gene name. If you know the gene symbol and species, enter them as follows: tpo[sym] AND human[orgn]
2. Click on the desired gene.
3. In the list of Links on the right, click "GeneView in dbSNP". If the link is not present, no SNPs are currently linked to this gene.

A NUCLEOTIDE OR PROTEIN ACCESSION NUMBER (e.g. NM_001126)

1. Search the Nucleotide or Protein database with the accession number.
2. In the Links menu in the upper right, click on "GeneView in dbSNP". If the link is not present, click on the "Gene" link in the same menu and continue at step 3 above under "a gene name".

A NUCLEOTIDE SEQUENCE

1. Go to the BLAST home page and click "nucleotide blast" under Basic BLAST.
2. Paste the sequence in the query box.
3. Enter the name of the organism of interest in the "Organism" box. Click the BLAST button.
4. Click on the desired sequence from the results.
5. Continue at step 2 under "a nucleotide or protein accession number" above.

A PROTEIN SEQUENCE

1. Go to the BLAST home page and click "protein blast" under Basic BLAST.
2. Paste the sequence in the query box.
3. Enter the name of the organism of interest in the "Organism" box. Click the BLAST button.
4. Click on the desired sequence from the results.
5. Continue at step 2 under "a nucleotide or protein accession number" above.