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.
Does texting long distance cost money? I just got a phone yesterday (MY 13TH BIRTHDAY!!!!) and I REALLY want to text my best friends. One of them moved to USA, Vermont, but we still talk on MSN all the time. Now that I have a phone I wanna text her!