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Homocysteinuria - Question and Review

In this video I have explained answer to the question on homocysteinuria. I have also reviewed methionine metabolism in brief and the fate of homocysteine. homocysteine can go into methionine formation by methylation pathway which requires methyl cobalamine (B12) and folate as N5 methyl THF. Homocysteine can also go into transulfuration pathway to form cysteine and alpha-ketobutyrate. methionine synthase and cystathionine beta synthase play a key role in the metabolism of homocysteine. patients with homocysteinuria will have mental retardation, stroke, myocardial infarction, Marfan syndrome habitus, thromboembolic episodes, mental retardation, osetoporosis, lens dislocation You Can Subscribe to my Channel for REGULAR UPDATES by clicking on SUBSCRIBE button above or by following the link below    / pmungli   You can follow me on my BLOG by clicking the link below http://drmungli.blogspot.com/ You can follow my Facebook page Biochemistry Made Easy by Dr Prakash Mungli, MD by clicking the link below. Here I post USMLE step-1 style MCQs and you can participate in discussion.   / drmungli   Key words: homocysteinuria methionine homocysteine cysteine methionine synthase B12 folate methyl cobalamin cobalamin N5 methyl THF THF folate trap mental retardation lens dislocation osteoporosis pyridoxine Marfan syndrome cystathionine beta synthase PLP cystathionine methionine synthase usmle step 1 Mungli