>So whilst 'X' may not be a standart IUPAC code, it is the case that some
>researchers will use 'X'...maybe acedb could run a simple check when
>sequences are loaded and not accept sequences with any non-standard
>code...or at least inform the curator when something non-standard is
read
>in.
>>>> 'X' is not an IUPAC
>> nucleotide ambiguity code (I think it is the protein ambiguity code).
>>
acedb> parse
// Type in your data in .ace format, then CTRL-D to finish
DNA toto
atgc
axgc
// 1 objects read with 0 errors
// 1 Active Objects
acedb> find dna toto
// Found 1 objects in this class
// 1 Active Objects
acedb> show
DNA : "toto"
atgca-gc
so x is treated as a place holder
which is probably what yuo want
considering that some biologists may use it
i apologize for my letter of 2 days ago, i guess
i was in a bad mood
jean