热凝胶多糖，又名可得然胶、卡德兰，是一种β-1,3-葡聚糖，是由葡萄糖组合而成的高分子聚合物。它包含了β-(1,3)-葡萄糖的残余物，并可经于其所构成的似水悬浮液中加热，形成具有弹性的胶状物质，称为卡德兰胶。

它是经由非病原细菌 Agrobacterium biobar 1（菌种发现时经鉴定为 Alcaligenes faecalis var. myxogenes）所生产出的。

热凝胶多糖是欧盟认可的食品添加物之一，E编码为E424 ，有些鱼浆制品为改善食物的粘性和Q度，会加入热凝胶多糖。

Curdlan is a linear beta-1,3-glucan, a high-molecular-weight polymer of glucose. Curdlan consists of β-(1,3)-linked glucose residues and forms elastic gels upon heating in aqueous suspension. It is produced by non-pathogenic bacteria such as Agrobacterium biobar. The production of curdlan by Alcaligenes faecalis is being developed to be used in gel production as well.