Removing an element from a list based on a predicate

Question

I want to remove an element from list, such that the element contains \'X\' or \'N\'. I have to apply for a large genome. Here is an example:

Answer 1

As S.Mark requested here is my version. It's probably slower but does make it easier to change what gets removed.

def filter_genome(genome, killlist = set("X N".split()):
    return [codon for codon in genome if 0 == len(set(codon) | killlist)]