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RandSeq - Random protein sequence generator

RandSeq is a tool which generates a random protein sequence.
Please fill out this form to submit the parameters for the generation of a random sequence.
Size of the sequence (20 to 9999 amino acids):

Composition of the sequence:
Equal composition for all amino acids
Composition of a specific sequence - please enter a UniProtKB (Swiss-Prot or TrEMBL) ID or AC:
Average amino acid composition (computed from Swiss-Prot)
User specified composition in percent (example: 6.30):


    Ala:  Arg:  Asn:  Asp: 


    Cys:  Gln:  Glu:  Gly: 


    His:  Ile:  Leu:  Lys: 


    Met:  Phe:  Pro:  Ser: 


    Thr:  Trp:  Tyr:  Val:
Output format:
Swiss-Prot format, html view with links to analysis tools
fasta (for programmatic access)

To generate the sequence:

To clear all fields: