FIELD: biological engineering. SUBSTANCE: method involves separating purple membrane fragments from halophilic bacteria biomass by means of cyclic extrusion under pressure of 10-150 MPa when the number of cycles is 1 to 5 and the following procedures of centrifuging and washing in distilled water is carried out at 25000 to 100000 during 30 min in each case until optic density ratio of purple membrane fragments suspension is equal to 1.9 to 2.1 at 260-560 nm wave length. EFFECT: multiple use of photorecording material. 2 cl, 5 dwg
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