Tryptase Delta 1 is a human gene encoded by the symbol, TPSD1. It may also be known as: Tryptase delta; HmMCP-3-like tryptase III; Mast cell mMCP-7-like; Tryptase-3; Delta-tryptase; Tryptase delta ; mMCP-7-like II; mMCP-7-like I; MMCP-7-LIKE-2; MCP7-LIKE; MCP7L1; MMCP-7L. The encoded protein is an enzyme with an amino acid length of 242 and a mass of 26.6 kDa. Other isoforms may exist. Tryptase Delta 1 is a member of the Peptidase S1 family, Tryptase subfamily. Homologs of this gene exist in other organisms, including: Rat.