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A cat hair showing agouti coloration A domestic rabbit with agouti coloration. Agouti is a type of fur coloration in which each hair displays two or more bands of pigmentation. [1] [2] The overall appearance of agouti fur is usually gray or dull brown, [3] although dull yellow is also possible.
An agouti dog, also called wolf sable. In dogs, the agouti gene is associated with various coat colors and patterns. [10]The alleles at the A locus are related to the production of agouti-signaling protein (ASIP) and determine whether an animal expresses an agouti appearance and, by controlling the distribution of pigment in individual hairs, what type of agouti.
Other genes (pattern modifier genes) are theorized to be responsible for creating various type of spotting patterns, many of which are variations on a basic mackerel or classic pattern. There are also hypothetical factors which affect the timing and frequency of the agouti shift, affecting agouti band width and the number and quality of ...
Chinchilla, an agouti color with bands of pearl white and black with a slate blue undercolor. The ears must have black lacing. Eyes—brown (preferred). Gray, (UK: Brown Grey) an Agouti color similar to that of the American cottontail, with bands of color on the hairshaft which produce a ring effect when blown into. The bands of color should be ...
Agouti-signaling protein is a protein that in humans is encoded by the ASIP gene. [5] [6] It is responsible for the distribution of melanin pigment in mammals.[7] [8] Agouti interacts with the melanocortin 1 receptor to determine whether the melanocyte (pigment cell) produces phaeomelanin (a red to yellow pigment), or eumelanin (a brown to black pigment). [9]
An agouti hair showing bands of eumelanin and phaeomelanin. Several loci can be grouped as controlling when and where on a dog eumelanin (blacks-browns) or phaeomelanin (reds-yellows) are produced: the Agouti (A), Extension (E) and Black (K) loci. [4] Intercellular signaling pathways tell a melanocyte which type of melanin to produce.
In a broken color pattern, this results in Tricolor. e: most black pigment removed (agouti becomes red or orange, self- becomes tortoise) "En" represents the plus/minus (blanket/spot) color locus. It is incompletely dominant and results in three possible color patterns:
Agouti hamsters have a ticked coat, where each individual fur is banded in different colours. Agouti hamsters also have "agouti markings" which consist of dark cheek markings, a dark marking on the head, and a light underbelly. Combinations are produced when two (or more) self or agouti colours are present.