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Retired NBME 24 Answers

nbme24/Block 3/Question#36 (reveal difficulty score)
A 1-month-old male newborn is brought to the ...
Tyrosine 🔍 / 📺 / 🌳 / 📖
tags: biochem repeat

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submitted by zelderonmorningstar(96)
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aCn eeoonms eaplixn hwy het earnsw cdnltu’o be lanpnyneialhe?

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donutsnduodenums  ehT ikd has isnabm,il hwhci is due ot saeddeecr tnryoisesa ttivyaci. fI eh sah a ombeprl igebmznitalo lehi,naeaPynnl eh udwlo eb nspgriteen with eth PUK sx ielk cutieltnleal iisilby,adt mytsu yobd ,oord tc,.e in idaidtno ot sih arif lonp.xcomei +22
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pathogen7  cciehalynT,l sabmnili is a bprelom csiensrgop DOP,A dan ont ,istrnoye no? I saalyw aocseisatd y"retoisn roenpicgss fcee"dt twhi oros,oisnhc chwih is hyw I dtdn'i ehocos seior.ynt usesG Im' wr.gno +5
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  • PKU commonly results from deficiencies in the enzyme phenylalanine hydroxylase, which converts phenylalanine to tyrosine.
  • Tyrosine, in turn, is required for synthesis of the catecholamines dopamine, norepinephrine, and epinephrine.
  • Supplementation with tyrosine effectively bypasses the defective enzyme and allows for the normal synthesis of catecholamines


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