I have a huge fasta format file(>225 Mb) containing nucleotide sequences. These are in the following format
>234 12 132
AGGCTTTCCGAGAATATACCAGAGCT
>321 45 765
ACCTGATATCGAGATCATAGAC
and so on .......
I want all these sequences as a single sequence in order to find ORF's. Please can you suggest some quick methods. Thanks in advance