58.4 MB (7.7 MB compressed)
4047 x 5045 pixels
34.3 x 42.7 cm ⏐ 13.5 x 16.8 in (300dpi)
CNRI / SCIENCE PHOTO LIBRARY PHOTO LIBRARY CNRI / SCIENCE PHOTO LIBRARY PHOTO LIBRARY
False-colour transmission electron micrograph of a human plasmocyte, a mature B-lymphocyte (white blood cell) that synthesizes and secretes antibodies for the immune system. Characteristic of a plasma cell is the parallel array of the rough endoplasmic reticulum, (yellow/green), the cisternae (elements) of which become dilated with antibodies (immunoglobulins). Antibodies produced by a single plasma cell are of one specificity and immunoglobulin class. The blue oval at centre is the nucleus which includes dark-staining chromatin (orange). Magnification: x4200 at 6x7cm size.
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