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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 ooesnem pexailn hwy het eanswr doc’unlt be n?aehlpnniyela

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donutsnduodenums  heT ikd sha abii,msln hichw si edu ot sdadreece tyaroensis .icivtaty fI he hsa a beormlp teianibglozm y,nalleiePannh eh wduol be ntpsegerni tiwh eth PUK xs keil eclatltleiun i,aylibitsd uystm doby droo, .cte, in idatniod ot ihs ifra elo.ocnimxp +22
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nbme4unme  Juts a tnoe tath rlUWod ssya huynplkartneeio atsetpin LAOS aevh nmlibsai, si't tjsu ttha eht eonru sx adn tyums deror aer evga.iswya +4
pathogen7  ,hlcnTalceyi mniiaslb is a proelbm riogpscesn PDAO, dan otn rytsne,oi ?no I aylswa saitdaosec istyer"no nopsgiresc dte"cfe hitw rsoooncsh,i wichh is ywh I ndt'id ohsceo .ntysorie usesG 'Im gwnr.o +5
cmun777  o@ngtp7hae oeyur' ont wrgon ti si clicyaflpies OAPD utb oluwd ayn of het otreh nsrwae iechsoc amke nay seesn over rn?seiyto +5
qiss  nogep@a7ht laso se-y uyo ctn'a maek PDOA caeuseb of a veeectfdi rnysoiaets ey.mnze Tshi nyeemz saol tbmesaoezil niyeotrs onit PDOA rboeef it maszietebol POAD ;MLR0hC1cQe=essenzcooi/pQwtpir=fbp&mteKi2Qxw/FsLg6rx13ah97;cptUg;qBX_;=rGK&h2a22AAn;b:0i9v521aswedmzo?am7=p=/pW0A&au&ows0auHb8aXrmy1-h=grmtashCl7g&amcKZAwDaokA#r;l8KEU=5mp&Eh3:0.zsR&TVpwgVq8.x1jwVYpNHqjos=j1VMgiiMa-VstmUwoiesyBGo2mB8i;tcam=m +

  • 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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