diff --git a/Biobase/Primary.hs b/Biobase/Primary.hs
--- a/Biobase/Primary.hs
+++ b/Biobase/Primary.hs
@@ -95,6 +95,22 @@
 
 nucCharList = map swap charNucList
 
+-- ** Methods to convert between DNA and RNA
+--
+-- TODO add all the rev-comp stuff and whatnot
+
+-- | @T@ to @U@
+
+convT2U x
+  | x == nT   = nU
+  | otherwise = x
+
+-- | @U@ to @T@
+
+convU2T x
+  | x == nU   = nT
+  | otherwise = x
+
 
 
 -- * Instances of different type classes
diff --git a/BiobaseXNA.cabal b/BiobaseXNA.cabal
--- a/BiobaseXNA.cabal
+++ b/BiobaseXNA.cabal
@@ -1,5 +1,5 @@
 name:           BiobaseXNA
-version:        0.8.1.0
+version:        0.8.1.1
 author:         Christian Hoener zu Siederdissen
 maintainer:     choener@tbi.univie.ac.at
 homepage:       http://www.tbi.univie.ac.at/~choener/