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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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anC enomeos epnalxi yhw eht werasn dno’ulct eb hne?llaeyipnan

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donutsnduodenums  hTe dik ash iimbsl,na ihwhc is edu to readeecsd trnseiosay cyittvai. fI he ash a mloprbe zmnoltbgeiai ln,ihneealnyaP eh owdul eb inrtpegsne whti the PUK xs ikel lcilneulteta tiyiblsia,d tumsy dbyo doro, ,c.et in dotdiian ot sih arfi co.inxpelmo +22
zelderonmorningstar  I es,e so fi ti asw KPU eh tn’uolwd ujst eb inesetpgrn fro a ioentru .naoteiaxmin It oldwu eb eno fo hoets ho“ pcar ’twhsa rwnog ihtw my bya”b nose. +16
wowo  A9F120 38p +
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pathogen7  cyicaT,lehln mnialisb is a ombpelr scnisopgre PODA, dan not ie,otsynr no? I yalaws oisdtcaesa oet"irysn eisoncpsrg ee"cdft thiw csno,rshioo iwhch is why I dn'itd heocso ystioern. eGuss I'm .wgrno +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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