Review of protein structure hierarchy Secondary structure-why o you get regular secondary structure? a-helices β- - strands SGAYGSVCAA FDTKTGHRVA VKKLSRPFQS IIHAKRTYRE LRLLKHMKHE EEEE区E EEE EEEE HHHHHHHHH HHHHHHReview of protein structure hierarchy • Secondary structure - why do you get regular secondary structure? α-helices β-strands SGAYGSVCAA FDTKTGHRVA VKKLSRPFQS IIHAKRTYRE LRLLKHMKHE EEEEEE EE EEE EEEE HHHHHHHHHH HHHHHH