Proteins are made from long chains of smaller molecules called amino acids. These long chains are folded into particular shapes. This is important in relation to how antibodies and enzymes work. Enzymes are biological catalysts. There are optimum temperatures and pH values at which their activity is greatest.
It costs just $0.25 to send a text message from the U.S. to an international number. For customers who frequently send text messages to family or friends overseas, AT&Tâs International Long Distance Messaging package includes 100 text messages sent from the U.S. for $10 a month.
At roughly 20 cents a pop, text messages are expensive. But it takes a bit of perspective to realize just how pricey they really are. Short-message-service messages (that's the official name for text messages, often abbreviated to SMS) have a maximum of 160 bytes of data. Unless you purchase a bulk text-message package (which can cost as much as $20 per month), the 20 cents-per-message rate adds up to $1310.72 per megabyte.