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TANTAN(1) User Commands TANTAN(1)

NAME

tantan - low complexity and tandem repeat masker for biosequences

SYNOPSIS

tantan [options] fasta-sequence-file(s)

DESCRIPTION

Find simple repeats in sequences

Options (default settings):

interpret the sequences as proteins
letter to use for masking, instead of lowercase
preserve uppercase/lowercase in non-masked regions
file for letter-pair score matrix
probability of a repeat starting per position (0.005)
probability of a repeat ending per position (0.05)
maximum tandem repeat period to consider (100, but -p selects 50)
probability decay per period (0.9)
match score (BLOSUM62 if -p, else 2 if -f4, else 1)
mismatch cost, 0 means infinite (BLOSUM62 if -p, else 7 if -f4, else 1)
gap existence cost (0)
gap extension cost, 0 means no gaps (7 if -f4, else 0)
minimum repeat probability for masking (0.5)
minimum copy number, affects -f4 only (2)
output type: 0=masked sequence, 1=repeat probabilities,
2=repeat counts, 3=BED, 4=tandem repeats (0)
show help message, then exit
show version information, then exit
August 2026 tantan 52