Positive test controls include: HeLa, NIH/3T3, C6. Immunogen sequence: MARTKQTARK STGGKAPRKQ LATKAARKSA PATGGVKKPH RYRPGTVALR EIRRYQKSTE LLIRKLPFQR LVREIAQDFK TDLRFQSSAV MALQEACEAY. Histone H3 is one of the DNA-binding proteins found in the chromatin of