Specifically, I'm trying to find the sequence of BxB1 and its att sites. I have success finding the att site sequences, but I'm having a bit more of an issue with finding the sequence of the actual recombinase. I've looked through Genebank, but I can't find a definitive sequence of the BxB1 recombinase.
How should I go about looking for this sequence?
EDIT: One more thing I'm concerned about is the validity of the sequences that I do find. For example, I have seen that Addgene has this pCAG-NLS-HA-Bxb1 sequence. However, I'm not sure how to verify that this sequence is correct.