diff --git a/bio-seq/src/codec/mod.rs b/bio-seq/src/codec.rs
similarity index 100%
rename from bio-seq/src/codec/mod.rs
rename to bio-seq/src/codec.rs
diff --git a/bio-seq/src/codec/degenerate/mod.rs b/bio-seq/src/codec/degenerate.rs
similarity index 100%
rename from bio-seq/src/codec/degenerate/mod.rs
rename to bio-seq/src/codec/degenerate.rs
diff --git a/bio-seq/src/codec/degenerate/iupac.rs b/bio-seq/src/codec/degenerate/iupac.rs
deleted file mode 100644
index 1052855..0000000
--- a/bio-seq/src/codec/degenerate/iupac.rs
+++ /dev/null
@@ -1,110 +0,0 @@
-use crate::codec::Codec;
-use crate::seq::{ReverseComplement, Seq};
-
-#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Codec)]
-#[bits(5)]
-#[repr(u8)]
-pub enum Iupac {
-    A = 0b10_0_00,
-    C = 0b01000,
-    G = 0b00010,
-    T = 0b00001,
-
-    Y = 0b01001,
-    R = 0b10010,
-    W = 0b10001,
-    S = 0b01010,
-
-    K = 0b00011,
-    M = 0b11000,
-    D = 0b10011,
-    V = 0b11010,
-
-    H = 0b11001,
-    B = 0b01011,
-
-    N = 0b11011,
-    #[display('-')]
-    X = 0b00000,
-
-    #[display('-')]
-    AMasked = 0b10_1_00,
-    #[display('-')]
-    CMasked = 0b01100,
-    #[display('-')]
-    GMasked = 0b00110,
-    #[display('-')]
-    TMasked = 0b00101,
-
-    #[display('-')]
-    YMasked = 0b01101,
-    #[display('-')]
-    RMasked = 0b10110,
-    #[display('-')]
-    WMasked = 0b10101,
-    #[display('-')]
-    SMasked = 0b01110,
-
-    #[display('-')]
-    KMasked = 0b00111,
-    #[display('-')]
-    MMasked = 0b11100,
-    #[display('-')]
-    DMasked = 0b10111,
-    #[display('-')]
-    VMasked = 0b11110,
-
-    #[display('-')]
-    HMasked = 0b11101,
-    #[display('-')]
-    BMasked = 0b01111,
-
-    #[display('-')]
-    NMasked = 0b11111,
-    #[display('-')]
-    XMasked = 0b00100,
-
-}
-
-/*
-impl Complement for Dna {
-    /// This representation can be complemented by reversing the bit pattern
-    fn comp(&self) -> Self {
-        // reverse the bits
-        Dna::unsafe_from_bits(b)
-    }
-}
-*/
-
-/*
-impl Dna {
-    /// Flipping the bit pattern masks/unmasks this representation
-    pub fn mask(&self) -> Self {
-        let b = *self as u8 ^ 0b1111;
-        Dna::unsafe_from_bits(b)
-    }
-}
-
-impl Seq<Dna> {
-    pub fn mask(&self) -> Self {
-        Self::from(!self.bv.clone())
-    }
-}
-
-impl ReverseComplement for Seq<Dna> {
-    type Output = Self;
-
-    fn revcomp(&self) -> Self {
-        let mut bv = self.bv.clone();
-        bv.reverse();
-        Self::from(bv)
-    }
-}
-*/
-#[cfg(test)]
-mod tests {
-    use crate::codec::masked;
-    use crate::prelude::*;
-
-
-}
diff --git a/bio-seq/src/codec/masked/mod.rs b/bio-seq/src/codec/masked.rs
similarity index 100%
rename from bio-seq/src/codec/masked/mod.rs
rename to bio-seq/src/codec/masked.rs
diff --git a/bio-seq/src/kmer/mod.rs b/bio-seq/src/kmer.rs
similarity index 100%
rename from bio-seq/src/kmer/mod.rs
rename to bio-seq/src/kmer.rs
diff --git a/bio-seq/src/seq/mod.rs b/bio-seq/src/seq.rs
similarity index 100%
rename from bio-seq/src/seq/mod.rs
rename to bio-seq/src/seq.rs
diff --git a/bio-seq/src/translation/mod.rs b/bio-seq/src/translation.rs
similarity index 100%
rename from bio-seq/src/translation/mod.rs
rename to bio-seq/src/translation.rs