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.
First off, to many people, classical music is a vague term meaning roughly mostly-instrumental music written by dead (or obscure modern) composers, typically performed by people in formalwear, and when used in this loose sense, it generally includes Baroque music. OK, with that out of the way, here are some more-precise definitions: 1  The Baroque era dates roughly from 1600 to 1750. Some examples of Baroque composers/performers: Monteverdi, Bach, Purcell, Handel, and Corelli. 2  The Classical era dates roughly from the mid-1700s to the mid-1800s.