title: [Spectrophotometric study of intact and trypsin-treated erythrocyte membranes using a phthalocyanine dye].
abstract: The sorption of vital phthalocyanine dye--Heliogen Blue (HB)--by red cells and their ghosts after trypsin treatment has been studied. The structural alteration in the outer and inner surface of the membrane was detected using the monomer-dimer ratio (M/D) deduced from the absorption spectra of the sorbed dye. The trypsin treatment causes the increase in the M/D ratio. It is greater (44%) when both the membrane surfaces are exposed to trypsin (unsealed ghosts), and is only 19% when the whole erythrocytes are treated. The similar alteration (M/D increased by 18%) is obtained for red blood cells stained after incubation in the isotonic buffer solution at 37 degrees C. Recent findings show a good agreement with our previous data on the influence of changes in the membrane surface on the value of the M/D ratio. A possibility of using HB in determination of structural changes of a native membrane is discussed.
mesh_terms: D000042:Absorption; D002021:Buffers; D004396:Coloring Agents / Q000032:analysis / Q000494:pharmacology*; D004910:Erythrocyte Membrane / Q000032:analysis / Q000187:drug effects* / Q000378:metabolism; D006801:Humans; D011485:Protein Binding / Q000187:drug effects; D013053:Spectrophotometry; D013696:Temperature; D014357:Trypsin / Q000032:analysis / Q000494:pharmacology*
chemical_list: D002021:Buffers; D004396:Coloring Agents; D014357:Trypsin
vernacular_title: Spektrofotometricheskoe issledovanie intaktnykh i obrabotannykh tripsinom éritrotsitarnykh membran s pomoshch'iu ftalotsianinovogo krasitelia.