obsolete poly-N-methyl-propylamination (obsolete GO:0018185)
OBSOLETE. The modification of peptidyl-lysine by the addition of an N6-propylamino and of propylmethylamino units, forming N6-(propylamino-poly(propylmethylamino)-propyldimethylamine)-L-lysine, typical of the silicate binding protein silaffin.