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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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nCa smonoee exiapln hyw het senarw dut’olnc be lia?npeneylnah

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donutsnduodenums  heT kid sha smi,inbal hhciw si ude ot deceradse rtyosansie vtiayc.it fI eh sah a olbrpme izmeglnobtai alPeanhine,lny he dowul eb tinrneegsp itwh het UKP xs kiel atnetelliluc diibatysli, umtys dyob do,ro ,te.c ni tidianod ot hsi rafi ie.xolopncm +22
zelderonmorningstar  I es,e os if it asw PKU eh ’wlntdou ujts be ngseierptn rof a ortneui x.menioaniat tI ouwdl be one of hteso h“o arpc ’hwtsa rgwno with my aybb” n.soe +16
wowo  1A2F90 38p +
nbme4unme  ustJ a eton ttah rUlWdo syas niunroapkeeylht asietpnt ALSO hvea niiml,sab 'ist sjut htta teh roeun sx dan mstuy reodr aer i.wvsygeaa +4
pathogen7  inlel,Tcahcy binislam is a eolpmrb osigpsenrc DPOA, nda tno syt,rione ?no I wysaal dosaacesti tyon"rsie enisocsprg tce"def htiw rcshos,nooi wchhi si hyw I 'tnidd soceoh yoet.nsir sesuG mI' .grwon +5
cmun777  pn7htoega@ reoy'u nto gowrn it is apifslceicyl APOD tub wludo yan fo eth herot rnsaew iochces kame yan sesne orve sron?iety +5
qiss  otp@ae7gnh aslo eys- ouy 'ntac meka ODAP beceaus fo a cvtfideee nyoisasret eyem.zn Tihs mzyene oals aesmobleizt reyotnis nito OPAD eerofb ti emtbiealzos DOPA r:rzw23jmc=kCyitU6WsmjXT2hQK-ii02aza8&e10oAZamGL0=/oMtwpxEmm&eqsGthwoaapmq8wrexonuUQgCae1;=XiK&;&rms0Vws-V=8biwHFN;;.VaL==/n?s3s=5xVe:p7Ash_ci/E02emtr.;M1oqp#gpBawmgrQgU;aicB5fRgja=zd&uwAtgtav8RbpYAio127KoKmhcslVcA;7b&ppypalh&smsBoHD21=9hM91 +

  • 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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