Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Molar ellipticity at the exciton couplet maximum (228 nm) versus temperature for three WW sequence mutants. The steeper pre-melting slope for the circular permutant likely reflects greater Trp χ angle variation with warming when the EtF Trp/Trp unit involves the chain terminal residues rather than being at a sequence-internal, turn-flanking position.
