part of
part_of
part of
zone of polarizing activity of pectoral appendage
zone of polarizing activity pectoral fin bud
ZFA:0001451
zone of polarizing activity of pectoral appendage (zebrafish)
zebrafish_anatomy
A small group of mesodermal cells located at the posterior margin of the developing fin bud. The ZPA is thought to produce retinoic acid and thereby provides positional information to the developing bud.
ZPA
TAO:0001451
portion of tissue