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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 seomneo exnialp why hte nsewar ncdul’ot be na?pninlheyale

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donutsnduodenums  eTh dki ash mlsnb,iia whhic is eud to dsedreaec eyartnssoi .ittyvaic fI eh sah a mroblep abelmznitoig lnnanP,yiahlee he uldow be ertpninsge hwti het UPK sx ilke lluletiancte ibisiy,tdal mtuys bydo dor,o ct,e. ni ddotinia ot shi iafr cxlniomo.pe +22
zelderonmorningstar  I ee,s os fi it wsa UPK he twold’nu jsut be nesigrptne fro a utinoer eonin.xmaati It uodwl eb eno of teohs “ho rcap hwt’as wgnro hiwt ym ”ybab .snoe +16
wowo  F02A91 3p8 +
nbme4unme  tsuJ a teon ttah rWoldU ysas hytlpaneenuiokr ttpesnai OLSA vaeh ails,minb 'sit jstu ttha hte runoe xs dan msytu rerdo era eas.awvyig +4
pathogen7  elTcyc,liahn nasiimbl is a ebmprol goprenscis OA,DP nad not nysietr,o no? I saalyw odatisaecs intyeors" inprcgseos dee"ctf whti nsos,oocirh chihw si yhw I ddt'in hooces et.nsoyir usesG 'mI wnog.r +5
cmun777  hpgoa@e7tn 'eryuo tno rognw ti si eacyficilspl OAPD ubt ulwod ayn fo eht rothe nwesra coihsec emak any essen evro ye?intosr +5
qiss  tpoga@e7nh sola s-ye uyo antc' kmae PODA abceuse fo a tfdiveeec sayenoitsr nze.yme hiTs zymene soal ziobleteasm nrytosie tnio ODAP oreefb ti seboltmezia DAOP =t:At0&H52a.xsRaemn?sVmg&zQqm:.8grfpaaimwCq=a;1s;2ohKQq81ab&L7#r-0meshREopz2YEhsV=X1mp0A5iQsF;3Durs7K&mew//9=1;Bx;=3cwrHg;ajosBaXte2=agWwic1Btomlh0aw8jsMnG-7&mA=l&cwAtg28M_;NmpGopKypkU&ac69r/xhpuTpZoiCAdbLi=Vcooghpwb1=zUmywesria2jiKeVVti0vMU +

  • 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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