Welcome to Westonci.ca, where you can find answers to all your questions from a community of experienced professionals. Connect with a community of professionals ready to help you find accurate solutions to your questions quickly and efficiently. Connect with a community of professionals ready to help you find accurate solutions to your questions quickly and efficiently.

beta ( ???? ) sheets are a type of secondary structure in proteins. a segment of a single chain in an antiparallel ???? sheet has a length of 221 å . how many residues are in this segment?