Polylysine and polyglutamate are two examples of synthetic polypeptides that can assume an α‑helical structure under appropriate conditions. identify which two synthetic polypeptides can form an α‑helix at the indicated ph values. polyglutamate at ph 13ph 13 polyglutamate at ph 2ph 2 polylysine at ph 2ph 2 polyglutamate at ph 7ph 7 polylysine at ph 13ph 13 polylysine at ph 7