ELISA kits for the study of the target, K-ras are available in ready-to-use formats. The protein is also known as KRAS proto-oncogene, GTPase or KRAS. It is a 189-residue protein with a cytoplasmic and membrane localization. In addition, up to 2 isoforms have been discovered. Other alias names for this target include: c-Ki-ras, PR310 c-K-ras oncogene, Kirsten rat sarcoma viral oncogene homolog, K-ras p21 protein, K-Ras 2, and GTPase KRas, and cellular c-Ki-ras2 proto-oncogene.