Antibody:

anti-Cxcr4

Structure	Level	Pattern	Image	Note
TS17: mesenchyme derived from somites 01-04	Present	Regionally restricted	2G	Co-expression with Lbx1 in muscle progenitors migrating along hypoglossal cord and in muscle progenitors in tongue anlage.
TS17: 1st branchial arch mesenchyme derived from head mesoderm	Present	Regionally restricted	2G	Expression in first branchial arch. Expression in most but not all Lbx1-expressing cells.

Structure	Level	Pattern	Image	Note
TS17: dermomyotome	Absent		3A	No expression in ventral dermomyotomal lip, delaminating Lbx1-expressing cells or myotome. Co-expression with Lbx1 only after migrating progenitors cells have moved away from the dermomyotome.
TS17: myotome	Absent		3A	No expression in ventral dermomyotomal lip, delaminating Lbx1-expressing cells or myotome. Co-expression with Lbx1 only after migrating progenitors cells have moved away from the dermomyotome.
TS17: forelimb bud mesenchyme	Present	Regionally restricted	3A	Co-expression with Lbx1 in muscle masses. All Cxcr4-expressing cells in premuscle masses also expressing Lbx1. Expression in subpopulation of Lbx1-expressing cells located close to ectoderm.
TS17: forelimb bud	Present	Regionally restricted	3A	Expression in limb endothelial cells.

Structure	Level	Pattern	Image	Note
TS18: forelimb bud mesenchyme	Present	Regionally restricted	3B	Co-expression with Lbx1 in muscle masses. All Cxcr4-expressing cells in premuscle masses also expressing Lbx1. Expression in subpopulation of Lbx1-expressing cells located close to ectoderm. Significant number of Lbx1-expressing cells remain negative for Cxcr4 expression.

Structure	Level	Pattern	Image	Note
TS18: forelimb bud mesenchyme	Present	Regionally restricted	3C	Co-expression with Lbx1 in muscle masses. All Cxcr4-expressing cells in premuscle masses also expressing Lbx1. Expression in subpopulation of Lbx1-expressing cells located close to ectoderm. Significant number of Lbx1-expressing cells remain negative for Cxcr4 expression.

Structure	Level	Pattern	Image	Note
TS17: forelimb bud mesenchyme	Present	Regionally restricted	3D	Co-expression with Lbx1 in muscle masses. All Cxcr4-expressing cells in premuscle masses also expressing Lbx1. Expression in subpopulation of Lbx1-expressing cells located close to ectoderm.

Structure	Level	Pattern	Image	Note
TS17: forelimb bud mesenchyme	Present	Regionally restricted	3E	Rare co-expression with Myod1.

Structure	Level	Pattern	Image	Note
TS17: forelimb bud mesenchyme	Present	Regionally restricted		Authors state Cxcr4-expressing and Myod1-expressing cell populations are distinct at E10.25, E10.5 and E11.25.

Structure	Level	Pattern	Image	Note
TS19: forelimb bud mesenchyme	Present	Regionally restricted	3F	Rare co-expression with Myod1.