A sample of the input file

>gi|269849759|sp|P04637.4|P53_HUMAN
MEEPQSDPSVEPPLSQETFSDLWKLLPENNVLSPLPSQAMDDLMLSPDDIEQWFTEDPGPDEAPRMPEAA....
>gi|143235535|dbj|46784|P53_MUS
----MEEPQSDPSVEPPL---SQETFSDLWKLL---PENNV---LSPLPSQAMDDLMLS....