Vitmain A is known as the antiinfective vitamin due to its 
role as vitmin in immune functioning especially in the 
activation of T-lymphocytes.

vitamin-A

Guaic test is a screening test to identify blood in the 
digestive tract. It is most common form of fecal occult 
blood test(FOBT). This test is performed either in home or 
hospital. 
The positive result of this test may indicate colon cancer, 
colon polyps, esophagitis, gastritis, 
hemorrhoids,inflammatory bowel disease, peptic ulcer, GI 
infection and esophageal varices.

Collagen is a major fibous protine of extracellular 
connective tissues, and it is also the most ubiquitous and 
pletiful In the animal Kingdom. Some 25-35% of body protein 
is collagen.

 

Collagen fibers gives strengh and structure to tissue in 
the body. Fibroblast cell produce collagen which from 
tissue structure and they contain collagen fibers arranged 
in three dimentions. 

Fibrils are smaller units of collagen fibers which are made 
of a repeating pattern of collagen molecules. The gaps and 
overlapping region between the molecules are specific, the 
gaps are there where the molecules may be cross linked. 

The collagen molecule is a rigid rod 2900A0 by 15A0 ,triple 
helical structure. The major portion consists of three 
amnioacid chains, each in a left handed delical 
conformation to make on super helix molecule with frayed 
non helical ends. 

Charaterised by repetitive Gly-X-Y sequences where glycine 
is In every third residue, and stabilized by proline and 
hydroxyproline resiues. Glycine has the hydrogen atom, the 
only element small enough to fit in the center of the super 
helix. 

There are various 13 types of collagen Identified and they 
are characterized collagen are type 1 and type 3. 

Collagen present in the body gives strength and structure 
to the tissues.In hard tissues inckuding bone, collagen 
functions to provide supports. 

In soft tissues, collgen matrix gives from and Integrity to 
tissues, In cardiovascular tissues, collagen froms a stiff 
layer that allow the artery a maximum exansion beyond which 
the artery would burst, thus providing protection.

enzyme that converts adenosine monophosphate to cyclic
adenosine monophosphate

delicate threadlike inclusions in the red blood cells in the
peripheral blood of some patients with severe/megaloblastic
anaemia

1)estimation of glucose by folin wu method
2)estimation of glucose by orthotoluidine method