Automated mouse genotyping service provides online reporting of genotyping results in as little as 24 hours. Outsourcing genotyping services simplifies unwieldy processes — extracting and testing DNA — while culling inventories of unneeded mice and testing supplies. Specifically, TransnetYX serves biotech and medical researchers working with transgenic, knock-out/knock-in, transgenic with knock-out, or targeted mutagenesis mouse lines. In addition to in-depth sequence identification, the system can also provide positive/negative information on the zygosity of submitted samples. The process is efficient. After placing an online order, the customer preps and sends the tail-sample using materials and preprinted shipping label supplied by TransnetYX. DNA is isolated and measured for purity and quantity the next morning. Then the sample is screened for the presence of the gene sequence of interest. An e-mail alerts the researcher that the final results are ready on the secure TransnetYX Web site. Rapid turnaround is provided by an automated genotyping system that separates DNA using a process that avoids noxious chemicals while producing very consistent and pure yields.