(1) The second main group puts together the GDAP1 proteins with those of the zeta, phi , omega, lambda, tau, beta, and theta classes, plus a few minor sets of sequences.(2) This use of h was first established in Latin, which used ch, ph, and th for the Greek letters chi, phi , and theta.(3) To design conserved primers, GST nucleotide and protein sequences from the classes phi , tau, and zeta were obtained from GenBank.
