This document provides information about EMBL, CLUSTALW, and how multiple sequence alignment can be performed using CLUSTALW. EMBL is a leading life sciences research institution located in the UK. CLUSTALW is a multiple sequence alignment software produced in 1994 that uses seeded guide trees and HMM profile-profile alignment. The document then describes how to use NCBI and BLAST to retrieve gene sequences and perform multiple sequence alignment using CLUSTALW online to analyze gene sequences and their phylogenetic relationships.