The Basic Local Alignment Search Tool (BLAST) finds regions of local similarity between biological sequences. The program compares nucleotide or protein sequences to sequence databases and calculates the statistical significance of matches. blast.ncbi.nlm.nih.gov
17 Things you should know about DNA (Infographic). It's the basic building block of all life but what do you really know about it? See how you compare to other humans and crack the genetic code with this informative infographic.