Matrix metalloproteinases (MMPs) are zinc-containing endopeptidases. They degrade proteins by cleavage of peptide bonds. More than twenty MMPs have been identified and are separated into six groups based on their structure and substrate specificity (collagenases, gelatinases, membrane type [MT-MMP], stromelysins, matrilysins, and others).
Confidence votes 164. Alleles are the different forms of a gene. Alleles are corresponding pairs of genes located at specific positions in the chromosomes. Together, alleles determine the genotype. Alleles which determine some aspect of the phenotype, the physical appearance of an organism, are said to be coding alleles.
Alleles are different versions of a gene for a certain characteristic or trait. b. The number of chromosomes increases with the complexity of the organism. c. Eukaryotes hold their DNA as long, linear strands while prokaryotes have circular loops. d. A DNA gene serves as the coded instructions for making a particular molecule of protein.