Immunogen sequence: KDCLIDKRQR NRCQYCRYQK CLVMGMKREA VQEERQRSRE RAESEAECAT SGHEDMPVER ILEAELAVEP KTESYGDMNM ENSTNDPVTN ICHAADKQ. Retinoic Acid (RA; active metabolite of vitamin A) plays a prominent role in regulating the transition of proliferating precu