| protein |
solubility |
comment1 |
comment2 |
examples |
|
|
|
|
| albumin |
sol/water |
coagulated by heat |
ppt by full satn of
amm So4 |
1-egg (ove albumin)
2-milk (lack albumin) 3-cereals |
|
| globulin |
insol/water ,sol/saline |
coagulated by heat |
ppt by 1/2 satn of amm
So4 |
1-egg (egg glo) 2-milk (lacto glo) 3-blood (serum glo) 4-muscle (myo glo) |
|
| prolamines (gliadin) |
insol/water ,sol/alc |
|
plant protein |
1-cereals(zein of
maize) 2-gliadin of wheat |
|
| glutedins |
sol/dil acid &alkali |
coagulated by heat |
plant protein |
1-glutelin of wheat
2-oxy zenin from rice |
|
| histones |
sol/water |
basic protein |
rich in AA histidine ,arginine ,lycine |
thymus gland (nucleoprotein) |
|
| protamine |
sol/water &amm So4 |
basic protein |
arginine |
nucleoprotein eg salmin of salmon |
|
| globin |
------------- |
basic protein |
histidine ,lycine |
RBCs combined e heme (HB) |
|
| scleroprotein |
insol/water and all neutral solvents |
*not digested at all *fibrous protein *has protective function |
|
a)keratin rich in lycine in hairs,nails ,horns
b) collagen :rich in
proline ,hydroxyproline in skin,tendons ,>heat e water =gelatin(
inadequate diet) >cool >gel c)Elastin :in ligaments of joints +elastic C.T of arteries |
|
| conjugated
proteins |
|
|
|
|
| type |
conjugated with |
comment |
example |
|
| phosphoprotein |
p |
p attached to oH gp of serine or threonine |
1-casein of milk ,2-vitelline of egg yolk ,, N.B albumin,
globulin ,casien are 3 proteins in milk so called (lactoprotein) |
|
| glycoprotein |
carbohydrates |
|
1-mucopolysacch. 2-mucin of salive 3-egg albumin 4-blood subs 5-hor as
FSH ,LH |
|
| chromoproteins |
coloured pigment |
metallo-chromo pr |
hb (red ,fe) , chlorophyll (green ,zn) |
|
| non-metallochr. Pr |
flouro-pr (yellow ,FMN or FAD) ,melano pr (melano keratin )keratin
pound to melanin ,carotenoids (eg rhodopsin) |
|
| metalo pr |
metals |
|
hb ,transferin ,ferritin
(contain iron) ,insulin
(hor contain zn ) ,carbonic anhydrase (enz contain zn) |
|
| lipo pr |
lipids |
|
|
|
|
| nucleo pr |
nucleic acid |
pr in this gp may be a)histone b) protamines |
chromosomes |
|
| derived proteins |
they are hydrolytic or denaturated products of either simple or
conjugated pr |
|
| primary pr derivative |
prodused by denaturation b alteration of structure of native pr
without hyd by the effect of heat (eg coagulated pr or by effect of conc acid or alkali (eg
alkaline meta protein) (gelatin is denaturated collagen) |
|
| secondry pr derivative |
they are hydrolytic products of pr prodused by partial hyd. |
|
|
|
|
| |
A-proteoses |
sol/water and not coagulated |
|
|
| |
1)primary proteoses |
ppted by 1/2 sat salt soln |
|
|
| |
2)secondry proteoses |
ppted by full sat. salt soln |
|
|
| |
B)peptones |
prodused by further hyd of proteoses ,sol/water ,not coagulated
/not ppted by amm So4 |
|
| |
C)peptides |
sol/water ,salt soln formed of 2 or more AA (2 dipeptide ,3 tri
…) eg physiologically active peptide :1-glutathione :tri ,posterior pit. Hor
:octapeptide , insulin :poly |
|
| |
d)AA |
final product of
hyd of protein |
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