Spermidine ndi mtundu wa polyamine. Ma polyamines ndi ang'onoang'ono, mafuta, polycationic (-NH3+) biomolecules. Pali ma polyamines anayi mu nyama zoyamwitsa: spermine, spermidine, putrescine ndi cadaverine. Spermine ndi ya tetramines, spermidine ndi ya triamines, putresc ...
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