Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

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.

View full-text article in PMC

. 2000 Jan 1;115(1):33–50. doi: 10.1085/jgp.115.1.33

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© 2000 The Rockefeller University Press

This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/).

PMC Copyright notice

Windowed α-periodicity analysis for S1–S4. (A) Windowed α-periodicity index analysis with a 13-residue sliding window (black line). (B) Windowed α-periodicity index analysis with a 17-residue sliding window (black line). The superimposed gray line in both A and B is a windowed hydrophobicity index calculated using the Kyte-Doolittle scale (Kyte and Doolittle 1982) with a 17-residue window. Dashed lines in both A and B mark α-PI = 2.0. α-PI ≥ 2.0 suggest α-helical secondary structure (Cornette et al. 1987; Rees et al. 1989b). The arrows mark positions in the S1–S2 and S3–S4 linkers with high α-PI values.