Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Absorption of amino acids and peptides
Generally, the dietary proteins are almost comp!etely digested to their constituent amino acids and these are rapidly absorbed from the intestine into the portal blood. Some of the dipeptides are hydrolyzed by peptidases located in the absorptive cells so that only amino acids are released into the portal blood. D-amino acids are absorbed by simple diffusion but the L-amino acids (occurring in foods) require a carrier system in the absorption.
The inechanism by which amino acids are absorbed is conceptually identical to that of monosaccharides. The luminal plasma membrane of the absorptive cell bears at least four sodium-dependent amino acid transporters (one each for acidic, basic, neutral and aromatic amino acids). Each system transports amino acids that are structurally similar. These transporters bind amino acids only after binding sodium. The fully loaded transporter then undergoes a conformational change that dumps sodium and the amino acid into the cytoplasm, followed by its reorientation back to the original form. Thus, absorption of amino acids is also absolutely dependent on the electrochemical gradient of sodium across the epithelium. The energy dependent carrier system also involves vitamin B6 (pyridoxal phosphate) during the transport of amino acids.
If the results of an experiment turn out differently then you expected, what does that mean? A. The experiment was a failure B. You did not follow scientific method C. You should e
Explain the Absorption, Storage and Elimination of Folate? Folic acid is readily absorbed from the small intestines through the portal vein and passed onto the tissues throug
how can i work with u as an online biology tutor?
Which structures of a flowering plant give rise to (a) potatoes, (b) the fleshy scales of an onion? (a) A potato is a tuber formed at the end of an underground stem (b) O
Q. Describe Cultural Characteristics of Microorganisms? Bacterial growth in and on foods often is extensive enough to make the food unattractive in appearance or otherwise obj
The depicted food web is not complete, mainly because: a. The number of producers is less than the number of consumers. b. There are no decomposers. c. Only secondary co
Healthy Person X is walking on level ground. Which of the following is true for the knee extensor muscle of X's right leg during the step cycle? A. The right knee extensor mus
Fungi The study of fungi (s. fungus) is called mycology. Fungi are unicellular or multicellular chemoheterotrophic eukaryotes. They may be grouped into yeasts, molds and funga
Define Ascorbic acid content of white blood cells? The ascorbic acid content of white blood cells and platelets is a good index of the tissue levels of ascorbic acid. The level
examples of pisces
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd