Quick academic help
Don't let the stress of school get you down! Have your essay written by a professional writer before the deadline arrives.
Sulphur Amino Acids: Biosynthesis of Cysteine and Methionine
Methionine is synthesized from oxaloacetate. Succinyl-CoA participates and cysteine donates a sulfur group to the molecule. Oxaloacetate is first converted into homoserine as described above in the threonine biosynthetic pathway. Homoserine then has a sulfur attached to the end in two steps and finally methionine is formed by the addition of a methyl group.
The biosynthesis of lysine, methionine and threonine are not, then,controlled as a group.The pathway from aspartate to lysine has 10 steps.The pathway from aspartate to threonine has 5 stepsThe pathway from aspartate to methionine has 7 stepsRegulation of the three pathways also occurs at the two branch points: -Aspartate-semialdehyde (homoserine and lysine) Homoserine (threonineand methionine)The regulation results from feedback inhibition by the amino acid products ofthe branches, indicated in the brackets above. We will consider one important step in the synthesis of this group of 3 aminoacids, namely the step in which homocysteine is converted to methionine,catalyzed by the enzyme : In this reaction, homocysteine is methylated to methionine, and the C1donor is N5-methyl-THF.
Protein Lounge: Biosynthesis of Cysteine in Mammals
Topics include cysteine biosynthesis in plants; the structural and functional role of cysteine residues; new cysteine synthesis pathways and their applications; implications for cysteine neurotoxicity; and the protecting groups used to cage cysteine and their applications in biochemical experiments are reviewed.
KEGG PATHWAY: Metabolic pathways - Reference …
Why choose our assistance?
As soon as we have completed your work, it will be proofread and given a thorough scan for plagiarism.
Our clients' personal information is kept confidential, so rest assured that no one will find out about our cooperation.
We write everything from scratch. You'll be sure to receive a plagiarism-free paper every time you place an order.
We will complete your paper on time, giving you total peace of mind with every assignment you entrust us with.
Want something changed in your paper? Request as many revisions as you want until you're completely satisfied with the outcome.
We're always here to help you solve any possible issue. Feel free to give us a call or write a message in chat.
How it works
You submit your order instructions
We assign an appropriate expert
The expert takes care of your task
We send it to you upon completion
Average quality score
"I have always been impressed by the quick turnaround and your thoroughness. Easily the most professional essay writing service on the web."
"Your assistance and the first class service is much appreciated. My essay reads so well and without your help I'm sure I would have been marked down again on grammar and syntax."
"Thanks again for your excellent work with my assignments. No doubts you're true experts at what you do and very approachable."
"Very professional, cheap and friendly service. Thanks for writing two important essays for me, I wouldn't have written it myself because of the tight deadline."
"Thanks for your cautious eye, attention to detail and overall superb service. Thanks to you, now I am confident that I can submit my term paper on time."
"Thank you for the GREAT work you have done. Just wanted to tell that I'm very happy with my essay and will get back with more assignments soon."