I am trying to split a large multifasta file into several smaller mutlifasta files. I have seen several examples of being used to split multifasta files into single fasta, but for not more than one fasta in a single file. Particularly I'm trying to split a fasta file containing 1300 sequences into 100 small files having sequentially 13 sequences in each (same accession number). Hoping for good suggestions. Thanks in advance.