Define absorption, storage and elimination of pyridoxine, Biology

Assignment Help:

Define Absorption, Storage and Elimination of Pyridoxine?

Pyridoxine, pyridoxal and pyridoxamine (along with their phosphorylated forms) occur in plant and animal foods. The phospborylated B6 vitamers are dephosphorylated by membrane bound alkaline phosphatase (found at' the intestinal brush border) and absorption occurs primarily in the intestine (jejunum) by passive diffusion as illustrated in Figure.

213_Define Absorption, Storage and Elimination of Pyridoxine.png

After absorption, each form of the vitamin is again phosphorylated (i.e. PLP, PNP, PMP)  and retained. This process is called metabolic trapping. Thus, free vitamers enter by passive diffusion, facilitated by metabolic trapping. The vitamin is transported in blood both in plasma and in red cells, mainly bound to albumin (refer to Figure) in plasma and haemoglobin in erythrocytes. Eighty percent of vitamin B6 is present in muscle. Excretion is through the urinary pathway.


Related Discussions:- Define absorption, storage and elimination of pyridoxine

What does the formula dpd = sf - tp mean, What does the formula DPD = SF - ...

What does the formula DPD = SF - TP mean? DPD is the abbreviation of diffusion pressure shortage, SF (suction force) is the vacuolar osmotic pressure and TP is the turgor press

Reproduction, The fusion of two individuals with each acting as a gamete is...

The fusion of two individuals with each acting as a gamete is known as

What is a biologic failure, What is A biologic Failure A biologic Fail...

What is A biologic Failure A biologic Failure can be defined as the inadequacy of the host to establish or to maintain osseointegration. The inability to establish osseoint

Procedures for diagnosis - polymerase chain reaction (pcr), P o lymer...

P o lymerase chain reaction (PCR): The PCR technique enables the exponential amplification of nucleic acid sequences from any biological samples. In the last few ye

What is the probability that their child have alkaptonuria, A recently marr...

A recently married man and woman discover that each had an uncle with alkaptonuria, otherwise known as "black urine disease," a rare disease caused by an auto somal recessive allel

Viral genome, describe the different types of genomes that viruses can have...

describe the different types of genomes that viruses can have

Explain metabolism of iron, Explain Metabolism of Iron? In this sub-sec...

Explain Metabolism of Iron? In this sub-section, we will study how body gets its iron supply, how iron is transported and utilized by the various tissues and how iron balance i

Respiration, explain why expired air contain co2

explain why expired air contain co2

Find which of the following is most stable, Hydrogen ( h) has 1 electron; C...

Hydrogen ( h) has 1 electron; Carbon ( c) has 6 electrons, use the octet rule to determine which of the following is most stable. Note: some of these may have double bonds. A. O

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd