Membranes contain large amounts of lipids, which are notoriously hydrophobic (water and oil don't mix). The membrane-spanning regions of membrane proteins are typically alpha helices, made of hydrophobic amino acids.
Florence, for example, hosted a brilliant period of musico-theatrical innovation at the dawn of the seventeenth century that led to the flowering of early opera. Rome continued to influence sacred music and for a time became an important center of opera, several types of vocal chamber music, and instrumental music. Venice, a leading musical city throughout the seventeenth century, nurtured the development of opera, as did Naples in the eighteenth century.
Two composers predominated in the first half of the Baroque period. Their music embodies many of the elements of the transition from Renaissance to Baroque style. These two composers were Claudio Monteverdi (1567-1643) and Heinrich Schutz (1585-1672).mportant Forms. In the Baroque period, some of the important choral forms, such as the ass and the motet, represented the continued development of Renaissance ideas. Others, such as the cantata and the oratorio, were newly created or assumed a new importance in terms of stylistic development.