Where possible samples are stored in multiple aliquots to limit the need for freeze thaw cycles. However, the number of aliquots varies between sample types and for some samples (e.g hair, teeth) only ...
Purify the vector products by electrophoresis through 0.8–1% agarose and determine the concentration of vector DNA by measuring UV absorbance at 260 nm or by running an aliquot on an agarose gel.
A finer grind size leads to a higher gold recovery: Batch samples were each milled at a specific grind size, incrementally finer in nature, resulting in incrementally improved gold recovery grades.