The APOBEC3 gene cluster encodes six cytidine deaminases (A3A-C. A3DE. A3F-H) with single stranded DNA (ssDNA) substrate specificity. For the moment A3A is the only enzyme that can initiate catabolism of both mitochondrial and nuclear DNA. https://fitnessgravesyardes.shop/product-category/pulley-axle-set/