Table 1.

Summary of Immunostaining Levels of Collagen Type III, Decorin, Fibronectin, TGF-ß1, -ß2, -ß3, and TGF-ßRI and -ßRII in Chick Embryonic Tendon^*

Tertiary Bundle	Col III	DCN	FN	TGF-ß1	TGF-ß2	TGF-ß3	TGF-ßRI	TGF-ßRII
Day 13	+++	+++	+++	-	+	++	+	+
Day 14	+	+++	+	-	+++	+++	+++	+++
Day 15	-	-	-	-	++	+	+	-
Day 16	-	-	-	-	++	+	+	-

Endotenon	Col III	DCN	FN	TGF-ß1	TGF-ß2	TGF-ß3	TGF-ßRI	TGF-ßRII
Day 13	+++	++	++	-	+	+++	+	+
Day 14	+	+++	++	+	++	+++	+++	+++
Day 15	+++	+	++	++	++	+++	++	++
Day 16	++	+	+	+++	++	+++	++	++

Tertiary Bundle (MTJ)	Col III	DCN	FN	TGF-ßl	TGF-ß2	TGF-ß2	TGF-ßRI	TGF-ßRII
Day 13	++	++	+++	-	+	+	+	+
Day 14	+	-	-	-	+	++	++	++
Day 15	-	-	-	-	+	+	+	+
Day 16	-	-	-	-	-	+	+	-

Muscle (MTJ)	Col III	DCN	FN	TGF-ßl	TGF-ß2	TGF-ß3	TGF-ßRI	TGF-ßRII
Day 13	++	-	+++	-	+++	+	++	+
Day 14	+	+	++	++	+++	+++	+++	+++
Day 15	+	+	+	+	+++	+++	+	+++
Day 16	+	+	+	+	+++	++	+++	-

^*Collagen type III, Col III; decorin, DCN: fibronectin, FN; MTJ, myotendinous junction