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I know why the older proteins described in the PDB file format end each line with the PDB code of the compound and the number of the line in the file.
It's so, at the dawn of time when you carried around protein structures in boxes of punched cards, you could sort on the field at the end of the line and get the cards back into order if you dropped the box.
It's so, at the dawn of time when you carried around protein structures in boxes of punched cards, you could sort on the field at the end of the line and get the cards back into order if you dropped the box.
