2.5.1.44	expressed in Escherichia coli. The host Escherichia coli cells without the recombinant homospermidine synthase orthologue accumulate putrescine, cadaverine and spermidine and expression of each the homospermidine syntase orthologue in Escherichia coli results in accumulation of homospermidine in the host cells	704662	
2.5.1.44	expression as an untagged protein in Escherichia coli BL21	751585	
2.5.1.44	gene hss	739378	
2.5.1.44	overexpressed in Escherichia coli BL21, which originally does not possess HSS activity. 40-50% of the soluble protein in crude extracts are detected as homospermidine synthase	288701