PPI for final demand falls 0.1% in December; services decrease 0.2%, goods unchanged 01/11/2018 The Producer Price Index for final demand fell 0.1 percent in December, as prices for final demand services decreased 0.2 percent and the index for final demand goods was unchanged. The final demand index climbed 2.6 percent in 2017.
Biological roles: 1. Amino acids can be metabolized to produce energy. This is especially. important during fasting, when the breakdown of muscle protein is a major. source of energy and biosynthetic precursors. 2. Some amino acids act as neurotransmitters, and some act as starting.
Report Abuse. Amino acids are the building blocks of protein. Twenty amino acids are needed to build the various proteins used in the growth, repair, and maintenance of body tissues.Eleven of these amino acids can be made by the body itself, while the other nine (called essential amino acids) must come from the diet.eport Abuse. Amino acids are the building blocks of protein. Twenty amino acids are needed to build the various proteins used in the growth, repair, and maintenance of body tissues.