81.   The protein it makes is a novel receptor of unknown function.

82.   The probe protein is also the basis of an AIDS vaccine about to be tested in the United States and Thailand.

83.   The protein is a so-called transcription factor that turns other genes on and off, he said.

84.   The protein is almost interchangeable.

85.   The researchers are also trying to determine whether there are other proteins in saliva that have anti-HIV activity.

86.   The sperm protein in question is at the heart of the fertilization process.

87.   These manufactured proteins are how the cells of the body carry out their work.

88.   These wound-repair proteins are the substances that produce allergic reactions in humans.

89.   There might be other proteins that continue to alter these interactions.

90.   This protein is the main ingredient of ligaments, which connect the bone to bone, and tendons, which connect bone to muscle.