SAGE identification of differentiation responsive genes in P19 embryonic cells induced to form cardiomyocytes in vitro. P19 embryonic carcinoma (EC) cells, induced to form cardiomyocytes in vitro, day 3+3.0 of differentiation protocol. Total number of 54,236 SAGE tags sequenced. 53,022 SAGE tags analyzed after clean-up (extraction of poly(A) tags, linker-generated tags, and tags originated from clones producing 4 tags or less). Keywords = EC cells, P19, differentiation, cardiomyocytes