Biochem Proteins

Hemoglobin

O2 carrier

Myoglobin

O2 storage

Transferrin

Transport of Iron

Ferritin

Storage of Iron

Oxytocin

Love hormone

Peptides

Fewer than 50 amino acids

Dipeptides

2 amino acids

Tripeptides

3 amino acids

Polypeptides

More than 10 amino acids

Proteins

More than 50 amino acids

Fibrous proteins

Fibre like in shape, insoluble in water and resistant to digestion

Globular proteins

Spherical or oval in shape, soluble and digestible

Simple proteins

Give one amino acid only upon hydrolysis

Conjugated proteins

Give an amino acid and a non-protein group upon hydrolysis

Derived proteins

Derived from simple and conjugated proteins

Globular protein

Insoluble in water and dilute salt solution

Globular proteins

Coagulated by heat

Globular protein

Found in plant and animal tissue

Albumin

Soluble in water ans dilute salt solutions

Globular protein

Precipitate by dilute ammonium sulphate

Glutelins

Insoluble in water and dilute salt solutions

Glutelins

Found in grains and cereals

Histones

Soluble in water, salt solutions, & dilute acids

Histones

Yield large amount of lysine and arginine

Histones

Combined with nucleic acids within cells

Prolamines

Soluble in 70% alcohol

Protamines

Strongly basic

Scleroproteins

Connective and hard tissues

Nucleoproteins

Contains nucleic acids, nitrogen, and phosphorus

Nucleoproteins

Present in all chromosomes and in all living forms as DNA and RNA