%%
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%%
%%  Example 8-3-9 on page 554.
%%
%%  Copyright (C) 2007 Michel Goossens, Frank Mittelbach, Denis Roegel, Sebastian Rahtz, Herbert Vo\ss
%%
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%%
%%  See http://www.latex-project.org/lppl.txt for details.
%%

\documentclass{ttctexagray}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{348.0pt}

\StartShownPreambleCommands
\usepackage[]{textopo}
\StopShownPreambleCommands
\begin{document}
\begin{textopo}
\sequence{%
 MNTSAPPAVS PNITVLAPGK GPWQVAFIGI TTGLLSLATV
 TGNLLVLISF KVNTELKTVN NYFLLSLACA DLIIGTFSMN
 LYTTYLLMGH WALGTLACDL WLALDYVASN ASVMNLLLIS
 FDRYFSVTRP LSYRAKRTPR RAALMIGLAW LVSFVLWAPA
 ILFWQYLVGE RTVLAGQCYI QFLSQPIITF GTAMAAFYLP
 VTVMCTLYWR IYRETENRAR ELAALQGSET PGKGGGSSSS
 SERSQPGAEG SPETPPGRCC RCCRAPRLLQ AYSWKEEEEE
 DEGSMESLTS SEGEEPGSEV VIKMPMVDPE AQAPTKQPPR
 SSPNTVKRPT KKGRDRAGKG QKPRGKEQLA KRKTFSLVKE
 KKAARTLSAI LLAFILTWTP YNIMVLVSTF CKDCVPETLW
 ELGYWLCYVN STINPMCYAL CNKAFRDTFR LLLLCRWDKR
 RWRKIPKRPG SVHRTPSRQC}

% position of the membrane regions
\MRs{25..47,62..82,100..121,142..164,187..209,367..387,402..421}
\Nterm{extra}% sets N-terminus

\loopfoot{5}{left[10]}% foot at 5th loop turns left after 10 residues
\loopextent{12}% maximum number of residues in straight sections of loop
\loopextent[C]{26}% for C-termini loop set to 26
\scaletopo{+1}
\labelstyle{black}{circ}{Black}{Black}{White}{}
\labelregion[E,7]{210..219}{black}{`neck'}
\labelregion[W,7]{237[NW]..248[SW]}{black}{`loopextent'}
\hidelegend
\end{textopo}
\end{document}