melanosome

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melanosome

(ˈmɛlənəʊˌsəʊm)
n
(Physiology) an organelle within a melanocyte that contains melanin
References in periodicals archive ?
The Rebel County palaeontologists discovered how to reconstruct the anatomy of vertebrate animals by analysing the chemistry of fossilised melanosomes (tiny granules in their cells) from internal organs.
As a matter of fact, skin pigmentation is the consequence of the transfer of black bodies called melanosomes from the melanocytes in the epidermis to the surrounding keratinocytes.
For these conditions, the targeted chromophores are water, hemoglobin, melanosomes, and tattoo ink.
Ultrastructural studies will confirm the presence of mature melanosomes and may show basement membrane material (Also demonstrable in type IV collagen immunopreparations) to incompletely invest some cellular processes or to surround groups of neoplastic melanocytes.
An increased number of melanosomes in dark skin corresponds to increased brightness on RCM when compared to fair skin.
(18) reported that silencing GPNMB by siRNA could attenuate the formation of melanosomes in melanocytes in a microphthalmia-associated transcription factor-independent manner.
They even show fine details of melanosomes, which may have given the fluffy feathers a ginger colour."
He explained that patients with darker skin types have bigger melanin granules and melanosomes, and more of them are deposited into keratinocytes.
People with skin types IV and V have acidic melanocyte dendrites because melanosomes are present in greater quantities compared to those with skin types I and II.
In melanocytes, the pigment melanin is produced and dispersed to the keratinocytes via melanosomes. Upon reaching the keratinocytes, melanin granules accumulate above the cell nuclei to protect the deoxyribonucleic acid (DNA) from UV-radiation-induced damage such as pyrimidine dimer formation.
This pigment is found in special organelles called melanosomes, and its production is caused by melanocytes.
Scientists have an idea about the colors of the feathers because of cellular structures called (http://palaeo.gly.bris.ac.uk/melanosomes/melanin.html) melanosomes that create pigment.