1.2.1.31 brain - 675897, 689379, 690142 1.2.1.31 brain fetal brain cDNA library 675897 1.2.1.31 brain highest expression 288202 1.2.1.31 brain mRNA expression 675897 1.2.1.31 breast cancer cell - 675897 1.2.1.31 cell culture the activity peaks during growth-phase preceding the onset of antibiotic production, which coincides with a decrease in enzyme activity, and is lower in high cephalosporin-producing strains 654293 1.2.1.31 cell culture the activity peaks during growth-phase preceding the onset of antibiotic production, which coincides with a decrease in enzyme activity, and is lower in high penicillin-producing strains 654293 1.2.1.31 colon - 288202, 675897 1.2.1.31 colon mRNA expression 675897 1.2.1.31 colonic adenocarcinoma cell colon adenocarcinoma, CX-1 675897