Changes of liver and kidney polyamine levels during aging.
D000375:Aging; D000818:Animals; D007668:Kidney / Q000378:metabolism*; D008099:Liver / Q000378:metabolism*; D008297:Male; D051381:Rats; D013095:Spermidine / Q000378:metabolism*; D013096:Spermine / Q000378:metabolism*
D013096:Spermine; D013095:Spermidine