Which among the following is the classic isoform of the regulatory subunit of the catalytic PI3K subunit?

Correct Answer: p85
P13 K have one regulatory subunit and one catalytic subunit. The regulatory subunit exists in its isoform p85 with SH2 domains. Phosphatidylinositol 3-kinases (P13K), are a set of enzymes that respond to various hormones like insulin and they have major role in various cell signalling pathways like that of cancer.