PDXK Enzyme and Vitamin B6 (image) Cold Spring Harbor Laboratory Share Print E-Mail Caption The PDXK enzyme manages the activity of B6, activating it when it is time for cells to divide. In AML, cancerous cells (green) can take advantage of this, quickly increasing their numbers. Credit Zhang lab/CSHL, 2020 Usage Restrictions Attribution needed Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.