In this section, the method of searching through Blast and Block will be introduced. Five of them and their introduction are shown below:

Nucleotide BLAST	allows one to input nucleotide sequences and compare these against other nucleotides in the NCBI nucleotide databases.
Protein BLAST	allows one to input protein sequences and compare these against other protein sequences in the NCBI protein databases.
Translated BLAST Searches	translate either query sequences or databases from nucleotides to proteins so that protein-nucleotide sequences can be performed.
Human Genome	allows one to compare sequences against the completed Human Genome contigs from the Genome Sequencing Centers. The data can be searched as separate chromosome or all chromosomes time. Helpful for determining the possible chromosomal location of a sequence.
Block	allows one to search for the conserved domains of the query protein sequence.

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