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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 neoosem alexnip ywh eht ranews lnoud’tc eb ?apinenenllyha

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donutsnduodenums  The dki has ,iialsmnb hwich si due to edrsdeaec yesnratios ttcayiiv. fI he ash a elprbom limbnetiozag heiylPnaeanln, he uodlw be enertnspig with teh PUK sx lkie etenilclulta ibyd,aistli msyut obdy ,door et,.c ni itdidnao ot hsi frai onpe.xomlic +22
zelderonmorningstar  I es,e so if it swa PUK he udnwtl’o ujst be reepnistng ofr a rutieno aemitxoa.nni tI udolw eb eon of ehsot ho“ arpc aswth’ gwnro whti ym bbay” .seno +16
wowo  A290F1 p83 +
nbme4unme  tJsu a etno htta rUoldW ayss nnpeurolaitkhye aistntpe LAOS vahe sliiabn,m 'its jtsu htta hte enoru sx nda ymtsu edrro rae agsaw.yevi +4
pathogen7  llinTecacyh, abnslmii si a omerlbp psgoensirc OAPD, nad ont tos,enyri on? I asywal iasadtseoc "tyrsnoei ceissgrpon "cdefet wtih iho,snooscr wchhi si wyh I nid'dt ohseoc eorti.syn sueGs m'I nw.ogr +5
cmun777  tpgeaoh7@n uoe'ry nto wngro ti is scpyaiellfic PODA ubt ulwdo yan fo teh tehor neasrw iohsecc meka ayn esens orve irtsn?yeo +5
qiss  ot@n7hpaeg loas s-ey you tacn' kaem PDOA buseace of a eitedfvce yisstoarne nm.eyze iThs ezmyne aslo zmoealestbi iostnrye ntoi ODPA eorfbe it blzeateosim OADP iaiwgRimMK:BzCg80idwc=12;-.1;3zva;ahsoh;sKhFBA/7msN/bamtXyKL:q2irw&00m8=Got&wsVX1zpou8q90p&1lUhHmm=UguiVAQAaca.j/;#&esa&-wt;0riGrpEoQheWmAp9oQM222as2awie;?AeUDwYaTx&=KV=RpEspmjtccro5n8eyb37sLxmh1tHnrwbg_ppt&1so==cfsajgZx7V5aogmMpBeV=lCmr=6kq +

  • 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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