Example:

If you have a gene such as this one Os08g41580 with the sequence below, you can copy and paste the sequence into the blast search window, and hit the search button.
The output from this search can be seen on this page.
Blast Output

ubiquitin carboxyl-terminal hydrolase 1, putative, expressed PASA (rice_release4_08302005) AUTOUPDATE: Updated structure of 11978.m08136 (update, updateIDs: 175846, (gene: 11978.t03887, model: 11978.m08136));
LOCN Exon
COOR C/26133646-26134941

 

Seq to be blasted

 Os08g41580 1296 chr08 C/26133646-26134941

ATGTATTCGGAGAAGAAGAAGGCAAGGGCGAGGGATGGGGATGGAGATCGGGATGCTGCC
GAGAGACGGCGGAAGGGGAAGGCCCCATGCCTGGAGCCGCCGCCGACACCGCCACGCGCG

ATGGCGGCGGCGGCGGCGGCGGAGGCCGGTCCTTCACGCGGCGGCTGCGTTCCGTCACGG
AATCCCTTGAAGGATCCGGGGGATTGCGAGGCGGTGGCCATCAGGGACACCGACGGCGAG
GACTGCGGCCACTTCAGCTGCGACATGGACGAGATCGCTGACATCGAGATGGGCATGGCC
GCCCGCGGCGACCCGATGTGCGAGCACGAGACGTGCCTGGCCACCGGGAGCAACCTCATG
ATGGTGTGCCCCGAATGCGGCTGGTGCTTCTGCGTCGGAGGGCTAGCCCACAGGGCCAAG
CCGCTGGGGCACATCAGGGAGCATGCCTACCGGAGGGCGCATTGGGTCGCGCTGCGCTGC
GAGGATCCGTGTGAGGGTTACTGCTTCGAGTGTGAGGATTCATTGGCAATTGAGAGCCAG
ATGGTGGCCGATGATGGCGCCGGAGGCGGCGAGGAAGGGTATGGATGTGTTGTCACAGGG
ATGCCGAATCTTGGGAACACCTGCTACCTGAACGCGCTGCTGCAGTGCCTCCTTGTGCTC
GGGAAGCTGCGGGCGAGGATCTTGGGGCCGGGCGCTCCGTCGGGTGTCCTTGGTGACTTG
CTGCATGATCTCTTTGTTGGTACAAATGGTCCGAGCTACGCTCGACGCCTGCTGGACCCG
GCGATGCTCTTGCGTTGTGTGCGCTTTCGTTACCCGCAGTTCCGAGGCATTGCTATGCAG
GACTGTCATGAATTGCTTTGCTGTTTGCGCGATGGTTTGGATGAGGATGAAAGGAAATGG
AGGGCTGGTAAGATGCAACAAGGTGCTCCTAGTGCTGTGGCTCCTACGGTTATTGATTCC
ATATTTGCTGGTCAGCTGTCTGTTACCTTGTCTTGCAAATGTTGCTCGTTTAAGTCAGAT
TCAGAGGAGGTATTCCATGATCTCTCAATGCCATTACCACCAAAGGGGACTCCAGCCAGA
AGTGTTGCATCACCACCACGGAATGGAAGATGCATATCTCAACAGAAGACTCATATGGAA
CTGTTTCCAGCAATCAACAAGACTAACACCGAAAAGATTCATGCAATTTCTGAAGGCGGT
GATGCTCAGGTTCCCGCTTCAGAATCGGAACATATGGTTATGGTGAAAACATCAGAGCCT
TTGGAAGTTGGTAAGTTTATGTGTTCCTGTGCCTAA