The Intermediate Disturbance Hypothesis Suggests Species Richness

Low rates of disturbance, competitively dominant species would outcompete all other species (K selected) At high levels of disturbance, species would be continually driven extinct and only good colonists and well disperse (r-selected) would persist. Intermediate disturbance, species richness is greatest in areas where disturbances are neither too large nor too small but are of intermediate size.

#Id: 7709

#Unit 1. Molecules and their Interaction Relevant to Biology

                              Type II β turn

#Id: 7710

#Unit 1. Molecules and their Interaction Relevant to Biology

#Id: 7711

#Unit 1. Molecules and their Interaction Relevant to Biology

                                                                 α-Turn

Contains hydrophilic amino acids and protrudes outside the protein surface like a hook.

Consists of 5 amino acids, generally termed as i, i+1, i+2, i+3 and i+4

H-bond is seen between i and i+4 (First and Fifth residue)

The conformation of i+1, i+2 and i+3 are crucial and on the basis of this, they are classified into

9 groups

#Id: 7712

#Unit 1. Molecules and their Interaction Relevant to Biology

                                                γ-Turn

Consists of 3 amino acids, generally termed as i, i + 1 and i + 2

H-bond is seen between i and i + 2 (First and Third residue)

The conformation of i + 1 is crucial and on the basis of this, they are classified into 2 groups

The dihedral angles of residue i + 1 are (70, -60) and (-70, 60) of the classical and inverse gamma turns

#Id: 7713

#Unit 1. Molecules and their Interaction Relevant to Biology

                                                        𝝅-Turn

Consists of 6 amino acids, generally termed as i, i + 1 , i + 2 i + 3 i + 4 and i + 5

H-bond is seen between i and i + 5 (First and sixth residue)

#Id: 8443

#Unit 1. Molecules and their Interaction Relevant to Biology