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Cover shows a coloured transmission electron micrograph of a growth hormone-producing cell (somatotroph) from the pituitary gland. The hormone is in the numerous granules (brown) within the cell cytoplasm (yellow). Visible cell organelles include mitochondria (round, green) and the nucleus (purple, centre) with its chromatin (pink). There are large amounts of rough endoplasmic reticulum (thin green) with the protein-synthesizing ribosomes (black dots).
Magnification: unknown.
Credit: VVG/Science Photo Library.