The Clearwing mutation causes a large reduction in the number of pigment granules in the cortex, but only a very small reduction in the number of pigment granules in the medulla.
32.
In one ancient fish, a heavily armored placoderm from the Devonian, some 370 million years ago, Parker and his colleagues found red pigment granules inside the chromatophores on the upper part of the body.
33.
Some neurons also contain pigment granules, such as neuromelanin ( a brownish-black pigment that is byproduct of synthesis of catecholamines ), and lipofuscin ( a yellowish-brown pigment ), both of which accumulate with age.
34.
The morphological features most commonly used to describe a species include the number of pigment granules, the degree of encirclement of the host nucleus, the size of the parasite, the degree of host nucleus displacement and the degree of host cell enlargement.
35.
Shroom2 is both necessary and sufficient to govern the localization of pigment granules at the locus encoding human SHROOM2 lies within the critical region for two distinct forms of ocular albinism, it is possible that SHROOM2 mutations may contribute to human visual system disorders.
36.
In 1956, Mary Whitear reported finding melanocytes, pigment cells in which reddish-brown pigment granules would still be present, in a skin specimen of a British fossil, R 509 . Ichthyosaurs are traditionally assumed to have employed countershading ( dark on top, light at the bottom ) like sharks, penguins and other modern animals, serving as camouflage during hunting.
