| tyrosinase-negative (ty-neg) oculocutaneous a. |
a recessive disorder characterized by absence of pigment in hair, skin, and eyes. Signs include white hair throughout life, skin that is pink and highly susceptible to neoplasias, absence of pigmented nevi or freckles, gray to blue eyes, prominent red reflexes from the fundi, severe nystagmus, photophobia, and reduced visual acuity (most patients are legally blind). Called also albinism, a. I, and complete perfect a.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| tyrosinase-positive (ty-pos) oculocutaneous a. |
a recessive disorder characterized by reduced, but usually visible, pigmentation in hair, skin, and eyes, which varies with race and age. Onset of pigment formation is delayed, pigment accumulates with age, and intensity of accumulation depends on race; hence all ty-pos infants resemble ty-neg infants, and ty-pos adult Blacks may be darker than normal blond Caucasians. The presence of pigmented nevi distinguishes ty-pos and ty-neg Caucasians. Called also a. II, albinoidism, and complete imperfect a.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| tyrosine 3-monooxygenase |
[EC 1.14.16.2] a monooxygenase that activates molecular oxygen to catalyze the hydroxylation of tyrosine to dopa; it requires the cofactor tetrahydrobiopterin. The enzyme occurs in the brain and is inactivated in malignant hyperphenylalaninemia.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| tyrosine aminotransferase |
tyrosine transaminase.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| tyrosine hydroxylase |
tyrosine 3-monooxygenase.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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