42 Research and development in the biotechnology fields, namely, conducting protein expression and purification, using mammalian, Baculovirus insect cell, E. coli, and yeast cell expression systems for protein expression and purification, large scale protein production in a gram scale, antibody production, custom rabbit polyclonal antibody production, hybridoma and in vitro monoclonal antibody production, antibody fragmentation, antibody labeling, protein modification, PEGylation, metabolic labeling with stable isotopes, protein crystallization, crystal screen and optimization, co-crystallization with compounds or ligands, molecular cloning, gene synthesis, site-directed mutagenesis, subcloning, and large scale plasmid production