From the sandy creek in the Cajon Pass, into Lone Pine Canyon, up and along the Blue Ridge to the summit of Mt. Baden-Powell, then edging along to Islip Saddle, the trail within proximatey to Wrightwood provides views of the extended metropolitan areas of Southern California and the Mojave Desert.
Guanine, along with adenine and cytosine, is present in both DNA and RNA, whereas thymine is usually seen only in DNA, and uracil only in RNA. Guanine has two tautomeric forms, the major keto form (see figures) and rare enol form. It binds to cytosine through three hydrogen bonds.
cytosine, C - a base found in DNA and RNA and derived from pyrimidine; pairs with guanine. coding DNA, exon - sequence of a gene's DNA that transcribes into protein structures; exons are interspersed with introns. intron, noncoding DNA - sequence of a eukaryotic gene's DNA that is not translated into a protein.