I entered the 80 a.a. sequences into the Fasta3 
Database Searches at EBI and found that 72 a.a. 
sequences are the same as that of the protein: 
heat-stable enterotoxin A4 precursor (STA4).
The two sequences are shown below as for
comparison:

    original peptide: W M P C S G G N M K K S I L F I F L S V    
      finding protein:                M K K S I L F I F L S V    

    original peptide: L S F S P F A Q D A K P V E S S K E K I       
     finding protein: L S F S P F A Q D A K P V E S S K E K I      

      original peptide:T L E S K K C N I A K K S N K S G P E S  
      finding protein: T L E S K K C N I A K K S N K S G P E S

     original peptide: M N S S N Y C C E L C C N P A C T G C Y
      finding protein: M N S S N Y C C E L C C N P A C T G C Y

  So this is not a new protein.

  To see the data of the protein, click here