Effects of storage method on DNA degradation in old bloodstain samples M. Hara, H. Nakanishi, S. Takahashi, A. Tamura, K. Yoneyama, K. Saito, A. Takada  Forensic Science International: Genetics Supplement Series  Volume 5, Pages e39-e41 (December 2015) DOI: 10.1016/j.fsigss.2015.09.016 Copyright © 2015 Elsevier Ireland Ltd Terms and Conditions

Fig. 1 The DNA degradation ratio in bloodstains stored at room temperature, 4°C, –20°C, and –80°C for 20 years; of whole blood samples stored at –20°C and –80°C for 20 years; and of fresh whole blood. Mean values±SD for six samples each are shown. Dark gray bars represent the 129:41bp ratio, whereas the light gray bars represent the 305:41bp ratio. *Significant differences were calculated using the t-test (P<0.05), compared with fresh whole blood. Forensic Science International: Genetics Supplement Series 2015 5, e39-e41DOI: (10.1016/j.fsigss.2015.09.016) Copyright © 2015 Elsevier Ireland Ltd Terms and Conditions