Although it is an essential nutrient, the body is able to synthesize niacin to meet som ebody needs from the amino acid tryptophan. this reaction requires which two other b vitamins as coenzymes?

Vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a.) antibody, antibiotic b.) antigen, antibody c.)antibiotic, antibody d.)antibody, antigen