Muco, Lipo, Phospho, and Metallo p
R
t etc. However Derived p
R
t are two types such
as Primary p
R
t (Coagulated p
R
t , Proteans, and Meta p
R
t etc.), and Secondary p
R
t
(Proteoses, Peptones, Poly P E
pt
, P E
pt etc.). The simple p
R
t only comprise of A m
a and
are further classified in to: Globular p
R
t : These p
R
t are oval or spherical shaped,
soluble in water or in other solvents and digestible (Table 23.1). F
b
R
s p
R
t : These are
Fiber like shape, water- insoluble and cannot be digested. A L
B
M ous or sclero p
R
t
establish the major group of F
b
R
s p
R
t . (Table 23.2) C o
Nj
T p
R
t : It makes these p
R
t up
of A m
a and non- p
R
t moiety which is also known as a prosthetic or C o
Nj
T group
(Table 23.3). Derived p
R
t : These p
R
t are derived from simple and C o
Nj
T p
R
t by
denaturation or degradation process. These are further divided into primary derived
p
R
t . It may also know as first hydrolyzed products of p
R
t . For example: Coagulated,
Proteans, Meta p
R
t . Secondary Derived p
R
t : These p
R
t are the degraded products of
p
R
t or the progressive hydrolytic products of p
R
t undergoing hydrolysis. Examples
include proteoses, peptones, poly P E
pt and P E
pt (Fig. 23.1).
Table 23.1 Examples of Globular p
R
t
p
R
t
Properties
Examples
ALBMs
Coagulates on heating and soluble in water forming
dilute salt solutions
Serum A L
B
M ,
Ov A L
B
M (egg),
Lact A L
B
M (milk)
Globulins
Soluble in neutral and dilute salt solutions
Serum globulins,
Vitelline (egg yolk)
Glutelins
Soluble in dilute acids & alkalis and are mostly found
in P
l
T
Oryzenin (rice),
Glutelin (wheat)
Prolamins
Soluble in 70% alcohol
Zein (maize),
Gliadin (wheat)
Histones
Soluble in dilute acids & water but insoluble in dilute
ammonium hydroxide
Thymus histones
Histones of codfish
sperm
Globins
Behaves like histones but is not basic and is not
precipitated by ammonium hydroxide
Thymus histones,
Histones of codfish
sperm
Protamines
Strongly basic and resemble histones but smaller and
soluble in ammonium hydroxide
Sperm p
R
t
Table 23.2 Examples of F
b
R
s p
R
t
Examples
Properties
Collagens
Connective tissue p
R
t but do not have tryptophan (T ryp
N ). On boiling with dilute
acids or water, yield gelatin which is soluble and digestible
Elastin
p
R
t of Elastic tissues such as arteries and tendons
Keratins
Present in an exoskeletal structure like hairs, horns, nails, etc.
23 Protein and Enzymes Isolated from Plant Sources …
795
R
t etc. However Derived p
R
t are two types such
as Primary p
R
t (Coagulated p
R
t , Proteans, and Meta p
R
t etc.), and Secondary p
R
t
(Proteoses, Peptones, Poly P E
pt
, P E
pt etc.). The simple p
R
t only comprise of A m
a and
are further classified in to: Globular p
R
t : These p
R
t are oval or spherical shaped,
soluble in water or in other solvents and digestible (Table 23.1). F
b
R
s p
R
t : These are
Fiber like shape, water- insoluble and cannot be digested. A L
B
M ous or sclero p
R
t
establish the major group of F
b
R
s p
R
t . (Table 23.2) C o
Nj
T p
R
t : It makes these p
R
t up
of A m
a and non- p
R
t moiety which is also known as a prosthetic or C o
Nj
T group
(Table 23.3). Derived p
R
t : These p
R
t are derived from simple and C o
Nj
T p
R
t by
denaturation or degradation process. These are further divided into primary derived
p
R
t . It may also know as first hydrolyzed products of p
R
t . For example: Coagulated,
Proteans, Meta p
R
t . Secondary Derived p
R
t : These p
R
t are the degraded products of
p
R
t or the progressive hydrolytic products of p
R
t undergoing hydrolysis. Examples
include proteoses, peptones, poly P E
pt and P E
pt (Fig. 23.1).
Table 23.1 Examples of Globular p
R
t
p
R
t
Properties
Examples
ALBMs
Coagulates on heating and soluble in water forming
dilute salt solutions
Serum A L
B
M ,
Ov A L
B
M (egg),
Lact A L
B
M (milk)
Globulins
Soluble in neutral and dilute salt solutions
Serum globulins,
Vitelline (egg yolk)
Glutelins
Soluble in dilute acids & alkalis and are mostly found
in P
l
T
Oryzenin (rice),
Glutelin (wheat)
Prolamins
Soluble in 70% alcohol
Zein (maize),
Gliadin (wheat)
Histones
Soluble in dilute acids & water but insoluble in dilute
ammonium hydroxide
Thymus histones
Histones of codfish
sperm
Globins
Behaves like histones but is not basic and is not
precipitated by ammonium hydroxide
Thymus histones,
Histones of codfish
sperm
Protamines
Strongly basic and resemble histones but smaller and
soluble in ammonium hydroxide
Sperm p
R
t
Table 23.2 Examples of F
b
R
s p
R
t
Examples
Properties
Collagens
Connective tissue p
R
t but do not have tryptophan (T ryp
N ). On boiling with dilute
acids or water, yield gelatin which is soluble and digestible
Elastin
p
R
t of Elastic tissues such as arteries and tendons
Keratins
Present in an exoskeletal structure like hairs, horns, nails, etc.
23 Protein and Enzymes Isolated from Plant Sources …
795