ABI SOLiD 5500XL Sequencer is a Genetic Analyser developed by Life Technologies however it was only made available in 2006. This method of sequencing provides internal accuracy checks as ligation is coded by 2 nucleotides. As a result each nucleotide is sequenced twice and the overall sequencing data is 99.95% accurate. The basic principal behind the functions of the SOLiD 5500xl sequencer is by fluorophore detection. The DNA sequencer is used to determine the order of the four bases: Guanine, Cytosine, Adenine and Thymine which is then reported as a test string known as a read. The ABI SOLiD 5500xl sequencer can provide information of medical value and future care.