Tissue samples
1) Fresh tissue preserved at -70 under frozen state.
2) The total amount of 20-30mg in the best.
DNA sequencing samples
1) Type: DNA samples without degradation or RNA contamination.
2) Demand: > 2ug.
3) Concentration: > 30ng.
4) Purity: OD260 / 280 = 1.8-2.0.