I have a FASTA file like this:
>1 TCAAGAGGGGTGAATGTGTTTCGCATGCACAAGGGACAGGAGTCT >2 ATCAGAGCTGGTGGGGTGGAGAGACAGAAACAAGTGGGAGAAGGT >3 TTATACCTACCTTATAGATAAGGAAATTGAAGCTTATAGAGTTTA >4 ATTTTTCCTTATGATACTCTATTGCCTCTCCATGGATAAAGACAG >5 AAACTCCTGACCTCAGGTGATCCACCTGCCTCGGCCTCCCAAAGT >6 TGCACACCTTCAGAACTGTGAACCAAATAAACCTCTCTTCTTTAAAATTATTCATCCTCT GGTATTCCTTTATAACAA >7 CTCTTGATGTCATTTCACTTCGGATTCTTCTTTAGAAAACTTGGA
Every sequence has fixed length of 45nt but some sequences like sequence no .6 has more length. There are some more sequences like sequence no. 6. I want to make each sequence of fixed length, that is, 45. I can truncate the sequence from 3' end. Is there any tool or awk or sed command?