protein as a transportation

Protein. Protein is an amino acid sequence (amino acid polymers) long. Amino acids can be distinguished: 1). Amino acids having non-polar R groups (hydrophobic) such as alanine, proline, valine, leucine, isoleucine, methionine, phenylalanine, and tryptophan. 2). Amino acids that have polar R groups and not charged as glycine, serine, threonine, tyrosine, asparagine, and glutamine. 3). Amino acids that have a negatively charged R groups such as aspartic acid and glutamic acid. 4). Having an amino acid R groups such positively charged lysine, arginine, and histidine. Classification of proteins based on physiological functions can be grouped into: 1). As transport and storage. As transport and storage as Contonya is hemoglobin as a carrier of oxygen from the lungs to body tissues, and myoglobin as an oxygen store in the muscle, and some transport proteins in the membrane. 2). As the structural network. As the network structural constituent teeth, bones, skin, tendons, hair, and nails. 3). As a catalyst such as an enzyme. As a catalyst such as an enzyme that is a catalyst of biochemical reactions. 4). As a driver. As the driving force as the contraction and expansion of muscles. 5). As a disseminator of information. As a disseminator of information such as the recipient nerve proteins of nerve impulses, a receptor protein on the cell surface, and the light receptors in vision and photosynthesis. 6). As genetic information. As genetic information as a repressor protein that controls the information derived materials, regulating cell growth and division. Based on their amino acid sequences, proteins can be classified into: 1). Protein is simple. Simple protein that is when it is hydrolyzed into amino acids, such as albumin and globulins. 2). Protein combined. Protein is made up of a combination of amino acids and other compounds such as glycoproteins, nucleoproteins, kromoprotein, lipoproteins, fosfoprotein, and metaloprotein. Classification of proteins based on their structures can be distinguished: 1). Protein primary, for example, consists of a linear amino acid. 2). Protein secondary is made up of hundreds of amino acids form a spiral. 3). Protein tertiary and consists of polypeptides with sulfur. 4). Protein quarter in which two or more of the peptide bond covalently.