Index: head/biology/Makefile
===================================================================
--- head/biology/Makefile
+++ head/biology/Makefile
@@ -20,6 +20,7 @@
     SUBDIR += cdbfasta
     SUBDIR += chemeq
     SUBDIR += clustalw
+    SUBDIR += clustalx
     SUBDIR += consed
     SUBDIR += crux
     SUBDIR += ddocent
Index: head/biology/clustalx/Makefile
===================================================================
--- head/biology/clustalx/Makefile
+++ head/biology/clustalx/Makefile
@@ -0,0 +1,36 @@
+# $FreeBSD$
+
+PORTNAME=	clustalx
+DISTVERSION=	2.1
+CATEGORIES=	biology
+MASTER_SITES=	http://www.clustal.org/download/current/ \
+		ftp://ftp.ebi.ac.uk/pub/software/clustalw2/${DISTVERSION}/
+
+MAINTAINER=	jwb@FreeBSD.org
+COMMENT=	Multiple alignment of nucleic acid and protein sequences with GUI
+
+LICENSE=	LGPL3
+LICENSE_FILE=	${WRKSRC}/COPYING
+
+USES=		qmake
+USE_QT4=	corelib gui moc qmake_build xml
+
+PLIST_FILES=	bin/clustalx \
+		${DATADIR}/colprot.xml \
+		${DATADIR}/coldna.xml \
+		${DATADIR}/colprint.xml \
+		${DATADIR}/clustalx.hlp
+
+post-patch:
+	@${REINPLACE_CMD} -e 's|col.*.xml|${DATADIR}/&|' \
+		${WRKSRC}/ClustalQtParams.h
+	@${REINPLACE_CMD} -e 's|clustalx.hlp|${DATADIR}/&|' \
+		${WRKSRC}/HelpDisplayWidget.cpp
+
+do-install:
+	${INSTALL_PROGRAM} ${WRKSRC}/clustalx ${STAGEDIR}${PREFIX}/bin
+	@${MKDIR} ${STAGEDIR}${DATADIR}
+	${INSTALL_DATA} ${WRKSRC}/col*.xml ${WRKSRC}/clustalx.hlp \
+		${STAGEDIR}${DATADIR}
+
+.include <bsd.port.mk>
Index: head/biology/clustalx/distinfo
===================================================================
--- head/biology/clustalx/distinfo
+++ head/biology/clustalx/distinfo
@@ -0,0 +1,3 @@
+TIMESTAMP = 1526839706
+SHA256 (clustalx-2.1.tar.gz) = e10adb728c320598a165ca529f1aa3d2560061de0236e0a0926eaca9554afa05
+SIZE (clustalx-2.1.tar.gz) = 341649
Index: head/biology/clustalx/files/patch-clustalW_general_VectorOutOfRange.h
===================================================================
--- head/biology/clustalx/files/patch-clustalW_general_VectorOutOfRange.h
+++ head/biology/clustalx/files/patch-clustalW_general_VectorOutOfRange.h
@@ -0,0 +1,11 @@
+--- clustalW/general/VectorOutOfRange.h.orig	2018-05-20 18:08:08 UTC
++++ clustalW/general/VectorOutOfRange.h
+@@ -5,6 +5,8 @@
+  */
+ #include <stdexcept>
+ #include <exception>
++#include <string>
++
+ namespace clustalw
+ {
+ 
Index: head/biology/clustalx/pkg-descr
===================================================================
--- head/biology/clustalx/pkg-descr
+++ head/biology/clustalx/pkg-descr
@@ -0,0 +1,8 @@
+ClustalX is the graphical version of Clustal, a general purpose multiple
+sequence alignment program for DNA or proteins. It produces biologically
+meaningful multiple sequence alignments of divergent sequences. It calculates
+the best match for the selected sequences, and lines them up so that the
+identities, similarities and differences can be seen. Evolutionary
+relationships can be seen via viewing Cladograms or Phylograms.
+
+WWW: http://www.clustal.org/