Amino Acid Metabolism Lecture 13 Flashcards
How many AA are essential?
9 Essential
11 Unessential
What is the difference between high and low quality protein sources?
High quality proteins such as soy and red meat contain only essential AA, Low quality protein sources such as plants contain a mixture of AA
What is the proper name for protein metabolism?
AA metabolism
What % body weight does your skeletal muscle make up?
40%
What sort of protein is in muscle?
90% of protein muscle weight is located in the muscle filaments. The small proportions in the capillary proteins etc.
What do bracnhed chain amino acids account for in muscle?
Branched chain amino acids account for 20% of the total amino acids in muscle proteins.
What are the two metabolic process amino acids can undergo?
- Protein Synthesis
- Deamination which produces urea and Alpha keto acid
What can amino acids be used for in regards to energy production?
They can enter the krebs cycle to produce ATP
Discuss the sources of amino acids in the protein pool and what they are used for?
Amino acids come from the diet and recycling of proteins, they are used to make new proteins i.e capillary structure or muscle filaments
What is an important concept within protein metabolism?
Amino Acids are recycled i.e proteins are recycled
Why do some proteins get converted into acetyl-coa or TCA intermediates?
As their breakdown releases energy- amino acids can be used to make hormones and an array of other proteins - recycling!
-This hopefully ensures that all proteins remain fresh
Why is there variation in the time it takes for proteins to be synthesized?
Protein synthesis requires DNA->RNA->Proteins but the difference is that regulatory proteins are small and readily made while structural proteins take time to produce
