Table 1.

Variants of PTHrP mRNA produced via alternative splicing at the 5′ and 3′ ends [2].

Promoter	Exons Included at the 5′ End	Ever-Present Exons	Exons Included at the 3′ End Protein Isoform (Amino Acids)
P1	I-II-III	V-VI	VII (139)-VIII (173)-IX (141)
	I-III
	I
P2	III	V-VI	VII (139)-VIII (173)-IX (141)
P3	IV	V-VI	VII (139)-VIII (173)-IX (141)