TP53 and colorectal carcinoma: With the exception of fusing CEABP2 to the C-terminus of p28-p53, which failed to yield detectable protein expression, the CEABP1-p28-p53, p28-p53-CEABP1, and CEABP2-p28-p53 proteins were purified to homogeneity and delivered to the CEA-expressing LS174T CRC cell line to examine the transcription of p53 target genes via the qRT-PCR assay.