46.6 MB (2.9 MB compressed)
4969 x 3281 pixels
42.2 x 27.7 cm ⏐ 16.6 x 10.9 in (300dpi)
DR ALEXANDER LAWTON / SCIENCE PHOTO LIBRARY DR ALEXANDER LAWTON / SCIENCE PHOTO LIBRARY
Fluorescence light micrograph of antibody- producing plasma cells in tissue from mouse spleen. These cells are producing two types of antibody protein: the red stained are secreting G (IgG), & the green stained immunoglobin M (IgM). No cell is stained both red & green, indicating the specificity of the immune response. They specialise in producing one sort of antibody only. Antibodies to IgM were labelled with the green dye fluorescein & antibodies to IgG with the red dye rhodamine. The labelled antibodies then bound selectively to cells with the corresponding surface immunoglobins. Magnification x440 at 35 mm size. Microcosmos P.39 fig.
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