Figure 4From: Systematic comparison of RNA extraction techniques from frozen and fresh lung tissues: checkpoint towards gene expression studiesTotal RNA quality assessment on the basis of 18S and 28S rRNA. On left side, lane # 1 shows DNA ladder (0.5 kb – 7.0 kb). The ethidium bromide-staining pattern of intact total RNA shows clearly defined 18S and 28S ribosomal RNA bands [lane # 3–5 (GTC; fresh); lane # 6–8 (SGC; fresh sample); lane # 9–11 (GTC; frozen); and lane # 12–14 (SGC; frozen).Back to article page