Figure 1
From: Use of dried blood samples for monitoring hepatitis B virus infection
Stability of the dried blood samples. PCR amplifications of HBV DNA from DBS. 1% Agarose gel showing a 322 bp fragment of the HBV-"a determinant" amplified from DBS samples stored at different temperatures. 1. DNA molecular markers; 2 negative control; 3 Plasma at -70 degree C; 4 DBS at -20 degree C; 5, DBS at 4 degree C; 6, DBS at 25 degree C; 7, DBS at 37 degree C. The arrowhead on the left denotes the 322-bp amplified product.