The fluorescence decay kinetics of photosynthetic mutants of Chlamydornonas reinhardii which lack photosystem 11 (PS 11), photosystem I (PS I), and both PS I1 and PS I have been measured. The PS I1 mutant strain 8-36C exhibits fluorescence decay lifetime components of 53, 424 and 2197 ps. The fluorescence decay of a PS I mutant strain 12-7 contains two major fluorescence decay components with l...

BACKGROUND Repeated immunizations with polysaccharide (PS) vaccines cause hyporesponsiveness through undefined mechanisms. We assessed the effects of a PS booster on immune responses, frequency, and survival of PS-specific B-cell subpopulations in spleen and bone marrow. METHODS Neonatal mice were primed with meningococcus serotype C (MenC) conjugate MenC-CRM(197)+CpG1826, boosted with MenC-C...