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.
genes are segments of DNA found on chromosomes that carry information for protein production that responsible for the inheritance of specific traits or alleles. the alternative or different forms of a gene is called an allele, each organism inherits an allele from each parent, some alleles are originated from: 1- genes found on autosomal chromosomes and they follow patterns of inheritance like mendal's laws 2- some alleles are originated from genes which can be found on sex chromosomes those follow different patterns of inheritance because sometimes some genes can be found only on the X chromosome and not the Y chromosome, so this trait is linked to the gender of the individual . example of sex linked trait hemophilia