Hand-foot-and-mouth disease is an illness that causes sores in or on the mouth and on the hands, feet, and sometimes the buttocks and legs. The sores may be painful. The illness usually doesn't last more than a week or so. Hand-foot-and-mouth disease is common in children but can also occur in adults. It can occur at any time of year but is most common in the summer and fall.
In fact, each gene in cellular DNA contains the code for a unique protein structure. Not only are these proteins assembled with different amino acid sequences, but they also are held together by different bonds and folded into a variety of three-dimensional structures.he linear sequence of amino acids within a protein is considered the primary structure of the protein. Proteins are built from a set of only twenty amino acids, each of which has a unique side chain.
The main features of the three-dimensional structure of DNA are: 1  DNA is double-stranded, so there are two polynucleotide stands alongside each other. 2  The two strands are wound round each other to form a double helix. 3  The two strands are joined together by hydrogen bonds between the bases. 4  The base pairs are specific. The base pairs are specific. 2  A only binds to T (and T with A), and C only binds to G (and G with C). 3  These are called complementary base pairs. 4  This means that whatever the sequence of bases along one strand, the sequence of bases on the other strand must be complementary to it.