TABLE 1.

Activities of CelI and its truncated forms on various cellulosic substrates

ProteinCMCPASCAvicelFilter paper
Sp acta%bSp act%Sp act%Sp act%
CelI1.2 × 10310093100171001.0100
CelI-t11.7 × 10314027294.5260.1212
CelI-t2NDc0NDd00.130.76NDe0
  • a Specific activity is defined as the generation of cellobiose (micromoles per minute) per unit protein (in micromoles).

  • b Percentage of specific activity of intact CelI.

  • c No activity detected (<5.2 μmol of cellobiose min−1 μmol of protein−1).

  • d No activity detected (<0.76 μmol of cellobiose min−1 μmol of protein−1).

  • e No activity detected (<6.4 × 10−3 μmol of cellobiose min−1 μmol of protein−1).