BIOMEDICAL IMAGING UNIT, SOUTHAMPTON GENERAL HOSPITAL / SCIENCE PHOTO LIBRARY BIOMEDICAL IMAGING UNIT, SOUTHAMPTON GENERAL HOSPITAL / SCIENCE PHOTO LIBRARY
Pigment molecule, coloured transmission electron micrograph (TEM). This is a molecule of a pigment protein called alpha-crustacyanin. This is found in the carapace (shell) of the common lobster (Homarus gammarus). It is a blue carotenoprotein. The molecule consists of eight subunits. These are linked to form the helical structure seen here. Magnification: x4,500,000 when printed 10cm wide.
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