GrandFather, you are genius! Your post helped me indirectly. How stupid I am. Apparently, END as a marker to indicate the end of file is mixed with the amino acid sequence END (Glutamic acid (E) - Asparagine (N) - Aspartic acid (D)). Thanks!

In reply to Re^8: Use of uninitialized value in string eq by sophix
in thread Use of uninitialized value in string eq by sophix

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