Peptidase
An enzyme that can break down a peptide into its component amino acids.
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- Peptide
A molecule consisting of 2 or more amino acids. Peptides are smaller than proteins, which are also chains of amino acids. Molecules small enough to be synthesized from the constituent amino acids are, by convention, called peptides rather than proteins. The dividing line is at about 50 amino acids. Depending on the number of amino […]
- Peptidomimetic
A compound that mimics the biological action of a peptide.
- Percentile
The percentage of individuals in a group who have achieved a certain quantity’such as height, weight, or head circumference’or a developmental milestone. For example, the fiftieth percentile for walking well is 12 months of age.
- Perception, auditory
The ability to identify, interpret, and attach meaning to sound.
- Perchlorate
A chemical used as the primary ingredient of solid rocket propellant and in munitions beginning in the 1950s. Perchlorate is also used in the production of explosives and fireworks. It adds the blue color to firework displays. Perchlorate remains in use and is unregulated. For disposal, perchlorate has often been dissolved in water and poured […]