Spermidine

... secondary structures, as proposed for other fungal or mammalian mt DNAS.gene name description AT5G19540.1 expressed protein AT5G19530.1 spermine/spermidine synthase family protein, similar to SP|P09158 Spermidine synthase (EC 2.5.1.16) (Putrescine aminopropyltransferase) {Escherichia coli}; contains ...

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From wikipedia Basic amines such as putrescine, spermine, spermidine and cadaverine are responsible for the smell and flavor of semen. These alkaline bases counteract the acidic environment of the vaginal canal (which is harmful to sperm), and protect ...

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