They contain carbon, hydrogen, oxygen and nitrogen and usually sulfur, occasionally phosphorus. Proteins form a large and essential part of the body mass, comprising especially cell membranes, connective tissue, muscles, enzymes, hormones, blood proteins. To maintain this mass the diet must contain a high proportion of protein, especially in growing animals and those recovering from debilitating diseases.
Russian composer Sergei Prokofiev wrote Peter and the Wolf in 1936 after returning to Moscow following a 19-year, self-imposed exile. It is a children's musical story that teaches about the orchestra by introducing various characters portrayed by seven themes played on either solo instruments or groups of instruments.
Instructor. Peter Lubbers is a Program Manager at Google in the Chrome Developer Relations team and lives and breathes HTML5. He is the co-author of Pro HTML5 Programming (Apress) and the founder of the San Francisco HTML5 User Group, the largest HTML5 User Group in the world. A native of the Netherlands, Peter served as a Special Forces commando in the Royal Dutch Green Berets.