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Chlorella cell envelopes were isolated by a mechanical procedure. The obtained morphological structure shown in an EM-picture has a mean density of ρ = 1.42. A characteristic chemical property of the envelope is the percentage of mono-and di-unsaturated C18-fatty acids which is considerably higher than that of intact cells. With 14C labelled sugars a selectivity of the hexose uptake could be shown, galactose uptake amounting only to about one fifth that of glucose and mannose. The uptake showsdoi:10.1515/znc-1975-9-1024 fatcat:du4wlhdor5auxjvur7mdou7g3u