Methionine is first converted to homocysteine which is converted to cysteine in conjugation with serine: The conversion of phenylalanine (an essential amino acid) to tyrosine is catalyzed by phenylalanine hydroxylase complex, a mixed function oxygenase present in mammalian liver but absent from other tissues. Amphibolic nature of kreb's cycle ... Anaplerosis is a series of enzymatic reactions in which metabolic intermediates enter the citric acid cycle from the cytosol. Alternative catabolites are excreted (Figure 29–14). While both glutamate and aspartate are substrates for the same transaminase, deamidation of their corresponding amides is catalyzed by different enzymes: asparaginase and glutaminase. Our mission is to provide an online platform to help students to share notes in Biology. The re­mainders are synthesized in the body. An overview of amphibolic intermediates formed from the carbon skeletons of amino acids. There are two metabolic disorders of proline catabolism. α-ketoacid + glutamate ⇄ amino acid + α-ketoglutarate TRANSAMINATION TYPICALLY INITIATES AMINO ACID CATABOLISM . 4. (e in b.c))if(0>=c.offsetWidth&&0>=c.offsetHeight)a=!1;else{d=c.getBoundingClientRect();var f=document.body;a=d.top+("pageYOffset"in window?window.pageYOffset:(document.documentElement||f.parentNode||f).scrollTop);d=d.left+("pageXOffset"in window?window.pageXOffset:(document.documentElement||f.parentNode||f).scrollLeft);f=a.toString()+","+d;b.b.hasOwnProperty(f)?a=!1:(b.b[f]=!0,a=a<=b.g.height&&d<=b.g.width)}a&&(b.a.push(e),b.c[e]=!0)}y.prototype.checkImageForCriticality=function(b){b.getBoundingClientRect&&z(this,b)};u("pagespeed.CriticalImages.checkImageForCriticality",function(b){x.checkImageForCriticality(b)});u("pagespeed.CriticalImages.checkCriticalImages",function(){A(x)});function A(b){b.b={};for(var c=["IMG","INPUT"],a=[],d=0;d