obsolete protein-N6-(L-lysyl)-L-lysine modification to protein-N6-(beta-lysyl)-L-lysine (obsolete GO:0072581)
OBSOLETE. The modification of an N6-(lysyl)-L-lysine residue in a protein, producing protein-N6-(beta-lysyl)-L-lysine ((2S)-2-amino-6-([(2S)-2,6-diaminohexanoyl]amino)hexanoic acid). This modification is observed in, and is probably unique to, translation elongation factor P (EF-P).