LIFE SCIENCE

Detailed explanation-1: -By contrast, in the membranes involved in ATP production (such as the internal membranes of mitochondria and chloroplasts), approximately 75% is protein. A typical plasma membrane is somewhere in between, with protein accounting for about 50% of its mass.

Detailed explanation-2: -Protein mass in healthy adults is relatively large, representing 10.6 kg, or 15.1%, of body mass in the reference man (1). The actual amount of protein found in living humans is based on 2 study sources, in vivo neutron activation (IVNA) analysis and non-IVNA methods (2, 3).

Detailed explanation-3: -It is well known that proteins are built up from an alphabet of 20 different amino acid types. These suffice to enable the protein to fold into its operative form relevant to its required functional roles.