anchor.diff:  (**
   Introduction
   ============
  -After you have downloaded and set up BioFSharp (as described [here](index.html#Setting-up-BioFSharp)), it is time to see it in action. Since we are programmers, let's say 'Hello World' !  
  +After you have downloaded and set up BioFSharp (as described [here](index.html#Installation)), it is time to see it in action. Since we are programmers, let's say 'Hello World' !  
   
   The focus of this brief tutorial lies on introducing you to the BioFSharp workflow. We will build a protein from a raw string and look at some of it's properties.
   Detailed information about the functions used can be either found in the specific tutorials in the sidebar or the API reference. 
   
   First, we reference and open BioFSharp.
   *)
  -
  +//Your path may differ
   #r"BioFSharp.dll"
   
   open BioFSharp
  
positive.code: 
  ///valid character 
  let valid = OptionConverter.charToOptionAminoAcid 'A'
  ///invalid character
  let invalid = OptionConverter.charToOptionAminoAcid '?'
  
  (**
  Which results in 'A' being recognized as `Some Ala` and '?' as `None`.
  
  To parse our entire string, we can use any of the BioCollections' `ofAminoAcidString` functions. For more information about BioSeq, BioList and BioArray go [here](Biosequences.html)
  *)
  
  ///Protein represented as a Bioseq
  let parsedProtein1 = rawString |> BioSeq.ofAminoAcidString 
  
  ///Protein represented as a BioList
  let parsedProtein2 = rawString |> BioList.ofAminoAcidString 
  
  ///Protein represented as a BioArray
  let parsedProtein3 = rawString |> BioArray.ofAminoAcidString 
  
  (**
  This yields us our Hello World protein. note that the '!' from the raw string is not contained in the sequence as it is not coding for an aminoacid.
  *)
  
  
  
  
  
negative.code: 
  (**
  
  BioFSharp comes with various data structures for biological objects such as amino acids. As you most likely know, you can abbreviate a
  sequence of aminoacids with a three or oneletter code for each single aminoacid. We can convert a character to an aminoacid by using the
  `charToOptionAminoAcid` function from the `BioItemsConverter` library. This will return us an option type, being either an aminoacid or `None` 
  if the caracter is not coding for an aminoacid.
  