The iScan technology housed within the ALSPAC laboratories provides an opportunity to collect valuable genetic data on specific samples in small scale projects. However, where dealing with small sample sizes and potentially valuable,limited, DNA sources, one needs to be confident in the efficiency and reliability of the lab based pipelines for data collection. This proposal simply seeks permission to use a small number (likely sample number for each test being 16 samples, though this may vary by platform) of DNA samples from the ALSPAC immortalised cell lines (which have a theoretically infinite supply of DNA) to test new arrays. Data generated from this testing will then be used to verify the performance of particular arrays before use on samples with a finite reserve.