a combined approach of cdna cloning and direct oligonucleotide mapping of tgf-beta 1 mrna from several human cell lines has revealed that the major human tgf-beta 1 transcript is 381 bases shorter than originally reported , and that the reduced mrna size is due to polyadenylation from an attaaa signal at position 2136 rather than use of the expected aataaa signal at position 2517 .
C0086418
human
C0080222
tgf-beta 1