特異性：Expressed in a number of embryonic tissues including the notochord, ventral neural tube, floor plate, lung bud, zone of polarizing activity and posterior distal mesenchyme of limbs. In the adult, expressed in lung and neural retina.
純度：>95% as determined by SDS-PAGE.
形状：Lyophilized from a 0.2 mum Filtered 20 mM PB, 150 mM NaCl, 1 mM DTT, pH 7.4
