Thank you all for your helpful contributions. Here is a sumary of the sugestions offered. 1)Not very critical, but could consider a nucleic acid to have about twice the size of a typical aminiacid. 2)Just an estimate is needed. Could simply calculate 3 residues per base or 6 per base pair. amino acid: 110 kD nucleotide: 330 kD base pair: 660 kD 3)Could use CONTENTS instead of NRESIDUE.
I used the second sugestion and everything seems fine sofar. Thanks again guys.
