The needle points are dipped in tuberculin purified protein derivative (PPD) and pricked into the skin.

Tomingal-like peptide is a newly discovered protein derivative.

Collagen is used to fill fleshy loose skin, while Botox, a purified protein derivative, relaxes muscles and helps smooth out lines.

Purified protein derivative (PPD) skin test (for tuberculosis)

Several types of tuberculin have been used for this, of which purified protein derivative (PPD) is the most important.

Both of these tests use the tuberculin derivative PPD (purified protein derivative).

The TB antigens used in a tuberculin skin test are called purified protein derivative (PPD).

This purified protein derivative (PPD) was used in the standard TB test.

In 1890 Koch developed tuberculin, a purified protein derivative of the bacteria.

The other 9 must be consumed (usually as their protein derivatives) in the diet and so are thus called essential amino acids.